444_百度百科 .rc-dialog{margin:10px;position:relative;width:auto}.rc-dialog-wrap{-webkit-overflow-scrolling:touch;bottom:0;left:0;outline:0;overflow:auto;position:fixed;right:0;top:0;z-index:1050}.rc-dialog-title{font-size:14px;font-weight:700;line-height:21px;margin:0}.rc-dialog-content{background-clip:padding-box;background-color:#fff;border:none;border-radius:6px 6px;position:relative}.rc-dialog-close{background:transparent;border:0;color:#000;cursor:pointer;filter:alpha(opacity=20);font-size:21px;font-weight:700;line-height:1;opacity:.2;position:absolute;right:20px;-webkit-text-decoration:none;text-decoration:none;text-shadow:0 1px 0 #fff;top:12px}.rc-dialog-close-x:after{content:"×"}.rc-dialog-close:hover{filter:alpha(opacity=100);opacity:1;-webkit-text-decoration:none;text-decoration:none}.rc-dialog-header{background:#fff;border-bottom:1px solid #e9e9e9;border-radius:5px 5px 0 0;color:#666;padding:13px 20px 14px}.rc-dialog-body{padding:20px}.rc-dialog-footer{border-radius:0 0 5px 5px;border-top:1px solid #e9e9e9;padding:10px 20px;text-align:right}.rc-dialog-zoom-appear,.rc-dialog-zoom-enter{animation-duration:.3s;animation-fill-mode:both;animation-play-state:paused;animation-timing-function:cubic-bezier(.08,.82,.17,1);opacity:0}.rc-dialog-zoom-leave{animation-duration:.3s;animation-fill-mode:both;animation-play-state:paused;animation-timing-function:cubic-bezier(.6,.04,.98,.34)}.rc-dialog-zoom-appear.rc-dialog-zoom-appear-active,.rc-dialog-zoom-enter.rc-dialog-zoom-enter-active{animation-name:rcDialogZoomIn;animation-play-state:running}.rc-dialog-zoom-leave.rc-dialog-zoom-leave-active{animation-name:rcDialogZoomOut;animation-play-state:running}@keyframes rcDialogZoomIn{0%{opacity:0;transform:scale(0)}to{opacity:1;transform:scale(1)}}@keyframes rcDialogZoomOut{0%{transform:scale(1)}to{opacity:0;transform:scale(0)}}@media (min-width:768px){.rc-dialog{margin:30px auto;width:600px}}.rc-dialog-mask{background-color:#373737;background-color:rgba(55,55,55,.6);bottom:0;filter:alpha(opacity=50);height:100%;left:0;position:fixed;right:0;top:0;z-index:1050}.rc-dialog-mask-hidden{display:none}.rc-dialog-fade-appear,.rc-dialog-fade-enter{opacity:0}.rc-dialog-fade-appear,.rc-dialog-fade-enter,.rc-dialog-fade-leave{animation-duration:.3s;animation-fill-mode:both;animation-play-state:paused;animation-timing-function:cubic-bezier(.55,0,.55,.2)}.rc-dialog-fade-appear.rc-dialog-fade-appear-active,.rc-dialog-fade-enter.rc-dialog-fade-enter-active{animation-name:rcDialogFadeIn;animation-play-state:running}.rc-dialog-fade-leave.rc-dialog-fade-leave-active{animation-name:rcDialogFadeOut;animation-play-state:running}@keyframes rcDialogFadeIn{0%{opacity:0}to{opacity:1}}@keyframes rcDialogFadeOut{0%{opacity:1}to{opacity:0}}.bk-dialog{left:50%;margin:0!important;position:absolute!important;top:50%;transform:translate(-50%,-50%)}.bk-dialog .rc-dialog-content{background:#fff;border:1px solid #bbb;border-radius:0}.bk-dialog .rc-dialog-header{background:#fafbfc;border-bottom:1px solid #e5e5e5;padding:10px 20px 9px}.bk-dialog .rc-dialog-title{color:#666;font-size:16px;font-weight:400}.bk-dialog .rc-dialog-close{color:#cbcbcb;font-size:18px;opacity:1}.bk-dialog .rc-dialog-body{padding:26px 50px 35px;text-align:center}.bk-dialog .dialog-title{color:#333;font-size:20px;font-weight:700;line-height:26px;margin-bottom:20px}.bk-dialog .dialog-content{color:#ccc;font-size:16px;line-height:26px}.bk-dialog .dialog-content .alert-content{align-items:center;display:flex;justify-content:center;padding-top:44px;width:378px}.bk-dialog .dialog-content .alert-content.no-icon .msg{max-width:378px}.bk-dialog .dialog-content .alert-content.no-sub-msg .msg h1{line-height:58px}.bk-dialog .dialog-content .alert-content .msg{flex:none;max-width:302px;text-align:center}.bk-dialog .dialog-content .alert-content .msg h1{color:#333;font-size:20px;line-height:32px;text-align:left}.bk-dialog .dialog-content .alert-content .msg pre{color:#888;font-family:arial,tahoma,Microsoft Yahei,"\5b8b\4f53",sans-serif,font-extend;font-size:14px;line-height:22px;text-align:left}.bk-dialog .dialog-content .alert-content .msg .ext-info{color:#888;font-size:12px;margin-top:14px;text-align:left}.bk-dialog .dialog-content .alert-content .msg .ext-info i{color:#52a3f5}.bk-dialog .dialog-content .alert-content .alert-icon{align-items:center;border:2px solid #b4d6f9;border-radius:56px;color:#52a3f5;display:flex;flex:none;height:56px;justify-content:center;margin-right:12px;width:56px}.bk-dialog .dialog-content .alert-content .alert-icon.error-icon{border-color:#fbddd6;color:#f18167}.bk-dialog .dialog-content .alert-content .alert-icon .icon{font-size:30px;line-height:0}.bk-dialog .btn-list{margin-top:35px}.bk-dialog .btn-list .btn-item{background:#52a3f5;border:1px solid #52a3f5;border-radius:3px;box-shadow:0 1px 0 rgba(0,0,0,.05);color:#fff;cursor:pointer;display:inline-block;font-size:16px;line-height:1;margin-right:10px;padding:8px 24px;text-align:center}.bk-dialog .btn-list .btn-item:last-child{margin-right:0}.popup-content{background:#fff;border:1px solid #d7d7d7;margin:auto;padding:5px;width:50%}[role=tooltip].popup-content{border-radius:5px;box-shadow:0 0 3px rgba(0,0,0,.16);width:200px}.popup-overlay{background:rgba(0,0,0,.5)}[data-popup=tooltip].popup-overlay{background:transparent}.popup-arrow{stroke-width:2px;stroke:#d7d7d7;stroke-dasharray:30px;stroke-dashoffset:-54px;bottom:0;color:#fff;filter:drop-shadow(0 -3px 3px rgba(0,0,0,.16));left:0;right:0;top:0}.bubble-box{background:#fff;border:1px solid #dfdfdf;border-radius:3px;box-shadow:0 4px 6px -4px rgba(0,0,0,.2);z-index:2000}.bubble-box,.bubble-box .bubble-arrow-place{position:absolute}.bubble-box .bubble-arrow{background:#fff;border:1px solid #dfdfdf;box-shadow:0 4px 6px -4px rgba(0,0,0,.2);height:10px;overflow:hidden;position:absolute;transform:rotate(45deg);width:10px;z-index:1}.bubble-box.top-left{bottom:100%;left:0;margin-bottom:6px}.bubble-box.top-left .bubble-arrow-place{bottom:-8px;height:8px;left:0;width:100%}.bubble-box.top-left .bubble-arrow{left:3px;margin-top:-6px;top:100%}.bubble-box.top-right{bottom:100%;margin-bottom:6px;right:0}.bubble-box.top-right .bubble-arrow-place{bottom:-8px;height:8px;left:0;width:100%}.bubble-box.top-right .bubble-arrow{margin-top:-6px;right:3px;top:100%}.bubble-box.top-center{bottom:100%;left:50%;margin-bottom:6px;transform:translateX(-50%)}.bubble-box.top-center .bubble-arrow-place{bottom:-8px;height:8px;left:0;width:100%}.bubble-box.top-center .bubble-arrow{left:50%;margin-left:-6px;margin-top:-6px;top:100%}.bubble-box.bottom-left{left:0;margin-top:6px;top:100%}.bubble-box.bottom-left .bubble-arrow-place{height:8px;left:0;top:-8px;width:100%}.bubble-box.bottom-left .bubble-arrow{bottom:100%;left:3px;margin-bottom:-6px}.bubble-box.bottom-right{margin-top:6px;right:0;top:100%}.bubble-box.bottom-right .bubble-arrow-place{height:8px;left:0;top:-8px;width:100%}.bubble-box.bottom-right .bubble-arrow{bottom:100%;margin-bottom:-6px;right:3px}.bubble-box.bottom-center{left:50%;margin-top:6px;top:100%;transform:translateX(-50%)}.bubble-box.bottom-center .bubble-arrow-place{height:8px;left:0;top:-8px;width:100%}.bubble-box.bottom-center .bubble-arrow{bottom:100%;left:50%;margin-bottom:-6px;margin-left:-6px}.bubble-box.left-top{margin-right:8px;right:100%;top:0}.bubble-box.left-top .bubble-arrow-place{height:100%;right:-8px;top:0;width:8px}.bubble-box.left-top .bubble-arrow{left:100%;margin-left:-6px;top:3px}.bubble-box.left-bottom{bottom:0;margin-right:8px;right:100%}.bubble-box.left-bottom .bubble-arrow-place{height:100%;right:-8px;top:0;width:8px}.bubble-box.left-bottom .bubble-arrow{bottom:3px;left:100%;margin-left:-6px}.bubble-box.left-center{margin-right:8px;right:100%;top:50%;transform:translateY(-50%)}.bubble-box.left-center .bubble-arrow-place{height:100%;right:-8px;top:0;width:8px}.bubble-box.left-center .bubble-arrow{left:100%;margin-left:-6px;margin-top:-6px;top:50%}.bubble-box.right-top{left:100%;margin-left:8px;top:0}.bubble-box.right-top .bubble-arrow-place{height:100%;left:-8px;top:0;width:8px}.bubble-box.right-top .bubble-arrow{margin-right:-6px;right:100%;top:3px}.bubble-box.right-bottom{bottom:0;left:100%;margin-left:8px}.bubble-box.right-bottom .bubble-arrow-place{height:100%;left:-8px;top:0;width:8px}.bubble-box.right-bottom .bubble-arrow{bottom:3px;margin-right:-6px;right:100%}.bubble-box.right-center{left:100%;margin-left:8px;top:50%;transform:translateY(-50%)}.bubble-box.right-center .bubble-arrow-place{height:100%;left:-8px;top:0;width:8px}.bubble-box.right-center .bubble-arrow{margin-right:-6px;margin-top:-6px;right:100%;top:50%}.bubble-box .bubble-content{background:#fff;border-radius:3px;overflow:hidden;position:relative;z-index:2}.user-bar{color:#333;display:flex;font-size:13px}.user-bar.dark-theme,.user-bar.dark-theme .user-bar-item .menu-item a,.user-bar.dark-theme .user-bar-item>a{color:#fff}.user-bar .user-bar-item{flex:none;padding:0 11px;position:relative}.user-bar .user-bar-item>a{color:#333;cursor:pointer;-webkit-text-decoration:none;text-decoration:none}.user-bar .user-bar-item>a:hover{-webkit-text-decoration:underline;text-decoration:underline}.user-bar .user-bar-item>a svg{fill:#c1c1c1;font-size:14px;margin:0 5px 0 3px;vertical-align:-2px}.user-bar .user-bar-item.message{margin-left:11px;margin-right:11px}.user-bar .user-bar-item .menu-item{font-size:12px;white-space:nowrap}.user-bar .user-bar-item .menu-item a{color:#333;cursor:pointer;display:block;height:24px;line-height:24px;padding:0 11px}.user-bar .user-bar-item .menu-item a:hover{background:#38f;color:#fff}.user-bar .user-bar-item .menu-item a:hover .msg-num{color:#fff}.user-bar .user-bar-item .menu-item .msg-num{color:#338de6;font-weight:700;margin-left:3px}.user-bar .user-bar-item .lemma-msg-bubble{background:#ffffda;border-radius:3px;font-size:12px;padding:10px 5px;position:relative;width:260px}.user-bar .user-bar-item .lemma-msg-bubble .lemma-msg-item a{color:#2b66b4;height:24px;line-height:24px;outline:0;padding:0 10px;-webkit-text-decoration:none;text-decoration:none}.user-bar .user-bar-item .lemma-msg-bubble .cancel-alarm{margin-top:10px}.user-bar .user-bar-item .lemma-msg-bubble .close-icon{color:#b0b0b0;cursor:pointer;font-size:12px;position:absolute;right:6px;top:6px}.user-bar.user-login .user-bar-item:last-child{margin-right:9px}.user-bar .triangle-down{border:4px solid transparent;border-top-color:#8b8c8c;position:absolute;right:0;top:7px}.clearfix{*zoom:1}.clearfix:after,.clearfix:before{content:" ";display:table}.clearfix:after{clear:both}.ellipsis{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.z-index-content{z-index:1}.z-index-fixed-content{z-index:100}.z-index-modal-mask{z-index:1000}.z-index-modal-content{z-index:1100}.z-index-popup{z-index:2000}.z-index-toast{z-index:3000}.gray{filter:grayscale(100%);-moz-filter:grayscale(100%);-ms-filter:grayscale(100%);-o-filter:grayscale(100%);filter:progid:DXImageTransform.Microsoft.BasicImage(grayscale=1);-webkit-filter:grayscale(1)}.lemmaSearchBarWrapper{margin:0 auto;position:relative;width:1139px}.lemmaSearchBar{box-sizing:border-box;height:104px;margin:auto;padding-top:25px;width:808px}@media screen and (min-width:1441px){.lemmaSearchBar{width:903px}}.fixedWrapper{background-color:#fff;border-bottom:1px solid #ebebeb;box-shadow:0 0 5px #888;height:66px;left:0;margin:auto;min-width:1140px;opacity:0;position:fixed;top:0;transition:opacity .3s;width:100%;z-index:100}.fixedWrapper,.fixedWrapper *{box-sizing:border-box}.fixedWrapper .fixedBg{height:66px;margin:auto;padding-top:12px;width:1140px}.fixedWrapper.fadeIn{opacity:1}.fixedWrapper.fadeOut{opacity:0}.fixedWrapper.show{z-index:100}.fixedWrapper.hide{z-index:-10}.searchBar{height:47px;margin:auto}.searchBar,.searchBar *{box-sizing:border-box}.searchBar .logoWrapper{display:inline-block;float:left;height:100%;width:154px}.searchBar .logoWrapper .logo{cursor:pointer;height:44px}.searchBar .rightWrapper{display:inline-block;float:left;height:100%;padding-top:7px;position:relative}.searchBar .rightWrapper .inputWrapper{display:inline-block;float:left;height:40px;position:relative}.searchBar .rightWrapper .inputWrapper .placeholder{color:#999;font-size:14px;font-weight:400;left:0;opacity:0;overflow:hidden;padding-left:10px;pointer-events:none;position:absolute;text-overflow:ellipsis;top:50%;transform:translateY(-50%);transition:.5s ease-out;transition-property:opacity;white-space:nowrap;width:calc(100% - 10px);z-index:1000}.searchBar .rightWrapper .inputWrapper .placeholder.showIn{opacity:1;transition:.5s ease-in}.searchBar .rightWrapper .inputWrapper .searchInput{border:1px solid #ccc;border-right:0;display:inline-block;font-size:16px;height:40px;line-height:28px;padding:6px 36px 4px 8px;-webkit-user-select:text;width:440px}.searchBar .rightWrapper .inputWrapper .searchInput::-webkit-input-placeholder{animation:zoomIn 1s ease-in-out;color:#999;font-size:14px;font-weight:400;opacity:var(--placeholder-color);overflow:hidden;text-overflow:ellipsis;-webkit-transition-property:opacity;transition-property:opacity;-webkit-transition:2s ease-out;transition:2s ease-out;white-space:nowrap}.searchBar .rightWrapper .inputWrapper .searchInput:hover{border-color:#999}.searchBar .rightWrapper .inputWrapper .searchInput:focus{border-color:#4791ff}@media screen and (min-width:1441px){.searchBar .rightWrapper .inputWrapper .searchInput{width:535px}}.searchBar .rightWrapper .inputWrapper .closeIcon{color:#9195a3;cursor:pointer;display:grid;font-size:16px;position:absolute;right:10px;top:50%;transform:translateY(-50%)}.searchBar .rightWrapper .resultWrapper{background:#fff;box-shadow:none;box-sizing:content-box;left:0;position:absolute;top:39px;width:100%;z-index:100}.searchBar .rightWrapper .lemmaBtn{-webkit-appearance:none;background:#38f;border:1px solid;border-color:#38f #38f #2d78f4;border-radius:0;color:#fff;cursor:pointer;display:inline-block;float:left;font-family:arial;font-size:16px;height:40px;letter-spacing:1px;outline:medium;width:104px}.searchBar .rightWrapper .lemmaBtn:hover{background:#317ef3;border-color:#317ef3}.searchBar .rightWrapper .siteBtn{-webkit-appearance:none;background-color:#fff;border:1px solid #2e82ff;border-radius:0;color:#38f;cursor:pointer;display:inline-block;float:left;font-family:arial;font-size:16px;height:40px;letter-spacing:1px;margin-left:4px;outline:medium;width:104px}.searchBar .rightWrapper .helpBtn{color:#333;display:inline-block;float:right;font-size:13px;margin-left:14px;margin-top:17px;position:absolute;-webkit-text-decoration:underline;text-decoration:underline;width:26px}.searchBar.top-search{height:38px}.searchBar.top-search .logoWrapper{margin-right:10px;width:100px}.searchBar.top-search .logoWrapper .logo{height:33px}.searchBar.top-search .rightWrapper{padding-top:4px}.searchBar.top-search .rightWrapper .inputWrapper{height:34px}.searchBar.top-search .rightWrapper .inputWrapper .searchInput{font-size:16px;height:34px;line-height:22px;padding:6px 36px 4px 8px;width:400px}.searchBar.top-search .rightWrapper .inputWrapper .resultWrapper{background:#fff;box-shadow:none;position:absolute;top:33px;width:100%;z-index:100}.searchBar.top-search .rightWrapper .lemmaBtn{font-size:14px;height:34px;width:100px}.searchBar.top-search .rightWrapper .helpBtn,.searchBar.top-search .rightWrapper .siteBtn{display:none}.searchBar .splitLine{background-color:#f5f5f5;height:1px;margin:13px 16px 16px;padding:0 8px}.searchBar .hotBox{border:1px solid #ccc;border-top:none;cursor:default;font-size:14px;font-weight:400;line-height:22px;padding:0 15px 16px}.searchBar .hotBox .hotList{display:flex}.searchBar .hotBox .hotList>div{width:calc(50% - 10px)}.searchBar .hotBox .hotList .hotLeftList{margin:7px 10px 0 0}.searchBar .hotBox .hotList .hotRightList{margin-top:7px}.searchBar .hotBox .hotList .hotItem{border:1px solid transparent;border-radius:6px;cursor:pointer;display:flex;margin-top:5px;overflow:hidden;padding:4px 7px}.searchBar .hotBox .hotList .hotItem:hover{border-color:#e0e0e0}.searchBar .hotBox .hotList .hotItem:hover .hotDesc,.searchBar .hotBox .hotList .hotItem:hover .hotTitle{color:#38e!important}.searchBar .hotBox .hotList .hotItem .hotIdx,.searchBar .hotBox .hotList .hotItem img{background:#f5f5f6;border-radius:4px;color:#5b5d66;flex:none;font-size:11px;font-weight:600;line-height:16px;margin-right:4px;position:relative;text-align:center;top:1px}.searchBar .hotBox .hotList .hotItem .hotIdx{height:16px;width:16px}.searchBar .hotBox .hotList .hotItem .hotContent{line-height:1;overflow:hidden}.searchBar .hotBox .hotList .hotItem .hotContent .hotTitle{color:#222;font-size:14px;font-weight:500;line-height:20px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-break:keep-all}.searchBar .hotBox .hotList .hotItem .hotContent .hotDesc{color:#666;font-size:12px;line-height:1.5;margin-top:1.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-break:keep-all}.searchBar .historyBox{border:1px solid #ccc;cursor:default;font-size:14px;font-weight:400;line-height:22px;padding:16px 15px 24px}.searchBar .historyBox .historyTitle img{display:inline-block}.searchBar .historyBox .historyTitle .delAllBtn{color:#9195a3;cursor:pointer;float:right;font-size:12px;font-weight:400;line-height:1}.searchBar .historyBox .historyList{cursor:default;font-size:14px;font-weight:400;line-height:0;margin-top:2px}.searchBar .historyBox .historyList .historyItem{background:#f5f5f6;border:1px solid #f5f5f6;border-radius:6px;box-sizing:border-box;cursor:pointer;display:inline-block;line-height:20px;margin-right:10px;margin-top:10px;max-width:calc(50% - 10px);padding:4px 7px;position:relative}.searchBar .historyBox .historyList .historyItem.active{background:0 0;border-color:#e0e0e0;color:#38f}.searchBar .historyBox .historyList .historyItem .historyContent{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;word-break:keep-all}.searchBar .historyBox .historyList .historyItem .delItemBtn{background:#ccc;border-radius:50%;box-sizing:content-box;font-size:12px;font-weight:bolder;height:12px;line-height:14px;padding:1px 0;position:absolute;right:-6px;text-align:center;top:-6px;width:14px}.searchBar .historyBox .historyList .historyItem .delItemBtn svg{color:#fff;transform:scale(.66667)}.searchBar .sugWrapper{border:1px solid #ccc}.searchBar .resultBox{height:auto;margin:8px 0;padding:0}.searchBar .resultBox .resultItem{align-items:center;color:#222;cursor:pointer;display:flex;overflow:hidden;padding:8px 16px}.searchBar .resultBox .resultItem.active{background:#f9f9f9;color:#38f}.searchBar .resultBox .resultItem .resultPic{flex:none;margin-right:8px}.searchBar .resultBox .resultItem .resultPic img{border:1px solid #f5f5f5;border-radius:6px}.searchBar .resultBox .resultItem .resultContent{font-size:14px;line-height:20px;overflow:hidden}.searchBar .resultBox .resultItem .resultContent .resultDesc,.searchBar .resultBox .resultItem .resultContent .resultTitle{margin-bottom:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.searchBar .resultBox .resultItem .resultContent .resultDesc{line-height:1.5}.searchBar .resultBox .resultFooter{color:#999;cursor:pointer;font-size:12px;line-height:1.5;margin:5px 16px}.searchBar .resultBox .resultFooter span{color:#38f}.searchBar .resultBox .resultFooter svg{vertical-align:-1px}.searchBar .sugListWrapper{color:#222;line-height:30px;padding:0 0 16px}.searchBar .sugListWrapper .sugList{list-style:none}.searchBar .sugListWrapper .sugList svg{color:#9195a3;font-size:18px;margin-right:2px;vertical-align:6px}.searchBar .sugListWrapper .sugList li:first-child{color:#222;cursor:default;font-size:14px;font-weight:500;line-height:1;margin:16px 16px 6px}.searchBar .sugListWrapper .sugList li:first-child svg{vertical-align:-4px}.searchBar .sugListWrapper .sugList li:not(:first-child){color:#222;cursor:pointer;font-size:14px;height:30px;line-height:30px;list-style:none;padding:0 16px}.searchBar .sugListWrapper .sugList li .sugListItem{word-wrap:normal;display:inline-block;max-width:80%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.searchBar .sugListWrapper .sugList li.active{background:#f9f9f9;color:#38f}.searchBar .sugListWrapper .sugFooter{background-color:#fafafa;color:#666;font-size:12px;font-weight:400;height:26px;line-height:26px;padding:0 10px;text-align:right}.searchBar .sugListWrapper .sugFooter .sugFooterClose{cursor:pointer;display:inline;-webkit-text-decoration:underline;text-decoration:underline}.index-module_topbar__aBAV7{border-bottom:1px solid #ebebeb;display:flex;height:32px;justify-content:flex-end;position:relative;z-index:6}.index-module_topbar__aBAV7 .index-module_websiteList__WqwA2{border-bottom:1px solid #f1f1f1}.index-module_topbar__aBAV7 .index-module_separator__gx7UX{border-right:1px solid #ebebeb;height:12px;margin:10px 13px 10px 25px}.index-module_topbar__aBAV7 .index-module_userBarBox__nGfXC{margin-top:6px}.container{font-size:0;height:32px;line-height:32px}.container .tabItem{color:#333;display:inline-block;font-size:13px;font-weight:700;outline:0;text-align:center;-webkit-text-decoration:underline;text-decoration:underline;width:54px}.container .baike{color:#666;-webkit-text-decoration:none;text-decoration:none}.index-module_navBarWrapper__X0DND{background:#459df5;height:45px;overflow:hidden;position:relative;z-index:5}.index-module_navBarWrapper__X0DND a{-webkit-text-decoration:none;text-decoration:none}.index-module_navBarWrapper__X0DND.index-module_hover__Gsl-V{overflow:visible}.index-module_navBarWrapper__X0DND.index-module_hover__Gsl-V .index-module_navBarBg__jLfYB{background:rgba(36,97,158,.95)}.index-module_navBarWrapper__X0DND.index-module_hover__Gsl-V dd{opacity:1}.index-module_navBarWrapper__X0DND .index-module_navBar__fLItn{background:#459df5;height:45px;min-width:900px;position:relative;z-index:2}.index-module_navBarWrapper__X0DND .index-module_navBarBg__jLfYB{height:276px;left:0;position:absolute;top:0;transition:.3s;width:100%;z-index:1}.index-module_navBarWrapper__X0DND .index-module_navBarList__iL2jR{background:#459df5;border-bottom:1px solid #3b92e9;border-top:1px solid #5895d5;display:flex;height:43px;margin:0 auto;position:relative;width:1140px}.index-module_navBarWrapper__X0DND dl{position:relative}.index-module_navBarWrapper__X0DND dl.index-module_cooperation__ZISm7,.index-module_navBarWrapper__X0DND dl.index-module_guidance__XWoyq,.index-module_navBarWrapper__X0DND dl.index-module_second-know__o9jR2,.index-module_navBarWrapper__X0DND dl.index-module_special__j8K7K,.index-module_navBarWrapper__X0DND dl.index-module_team__Heqwh{width:126px}.index-module_navBarWrapper__X0DND dl.index-module_cooperation__ZISm7 dt,.index-module_navBarWrapper__X0DND dl.index-module_guidance__XWoyq dt,.index-module_navBarWrapper__X0DND dl.index-module_second-know__o9jR2 dt,.index-module_navBarWrapper__X0DND dl.index-module_special__j8K7K dt,.index-module_navBarWrapper__X0DND dl.index-module_team__Heqwh dt{width:124px}.index-module_navBarWrapper__X0DND dl.index-module_cooperation__ZISm7 dd,.index-module_navBarWrapper__X0DND dl.index-module_guidance__XWoyq dd,.index-module_navBarWrapper__X0DND dl.index-module_second-know__o9jR2 dd,.index-module_navBarWrapper__X0DND dl.index-module_special__j8K7K dd,.index-module_navBarWrapper__X0DND dl.index-module_team__Heqwh dd{width:125px}.index-module_navBarWrapper__X0DND dl.index-module_index__Kc2gf,.index-module_navBarWrapper__X0DND dl.index-module_user__Kc93c{width:94px}.index-module_navBarWrapper__X0DND dl.index-module_index__Kc2gf dt,.index-module_navBarWrapper__X0DND dl.index-module_user__Kc93c dt{width:92px}.index-module_navBarWrapper__X0DND dl.index-module_index__Kc2gf dd,.index-module_navBarWrapper__X0DND dl.index-module_user__Kc93c dd{width:93px}.index-module_navBarWrapper__X0DND dl.index-module_knowledge__9fisv dd,.index-module_navBarWrapper__X0DND dl.index-module_knowledge__9fisv dt{width:140px}.index-module_navBarWrapper__X0DND dl:hover dt{background:#338ce6}.index-module_navBarWrapper__X0DND dl:hover dd{background:#19508b;border-color:#184f8b}.index-module_navBarWrapper__X0DND dl:hover+dl dd{border-color:transparent!important;border-color:#184f8b}.index-module_navBarWrapper__X0DND dt{border-left:1px solid transparent!important;border-right:1px solid transparent!important;border:1px solid #59a1e9;border-bottom:0;border-top:0;color:#f5f5f5;cursor:pointer;font-size:16px;height:44px;line-height:44px;text-align:center;transition:background .3s}.index-module_navBarWrapper__X0DND dt a{color:#f5f5f5}.index-module_navBarWrapper__X0DND dt a.index-module_selected__6G8lk{border-bottom:2px solid #fff}.index-module_navBarWrapper__X0DND dd{border-left:1px solid #3a6fa2;height:210px;opacity:0;padding:11px 0 10px;transition:.3s}.index-module_navBarWrapper__X0DND dd .index-module_navBarItem__m7wZ4{font-size:14px;height:30px;line-height:30px;text-align:center}.index-module_navBarWrapper__X0DND dd .index-module_navBarItem__m7wZ4 a{color:#a2c9f0;padding-bottom:3px}.index-module_navBarWrapper__X0DND dd .index-module_navBarItem__m7wZ4 a:hover{border-bottom:2px solid #fff;color:#fff}.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ{align-items:center;display:flex;font-size:16px;height:24px;line-height:24px;margin:10px 0;position:absolute;right:0}.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_appDownload__Bx1Uj,.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_usercenter__brbF2{font-size:16px;height:16px;line-height:1;padding:0 15px}.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_appDownload__Bx1Uj a,.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_usercenter__brbF2 a{color:#fff}.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_appDownload__Bx1Uj path,.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_appDownload__Bx1Uj svg,.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_usercenter__brbF2 path,.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_usercenter__brbF2 svg{fill:#fff}.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_appDownload__Bx1Uj svg{animation:index-module_phone__w9Py1 2s;-webkit-animation:index-module_phone__w9Py1 2s infinite;font-size:18px;margin-right:3px;transform:rotate(0);transform-origin:center;vertical-align:-3px}.index-module_navBarWrapper__X0DND .index-module_rightList__RchPZ .index-module_usercenter__brbF2 svg{font-size:14px;margin-right:6px;vertical-align:-1px}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ{background:#9e1814}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ.index-module_hover__Gsl-V .index-module_navBarBg__jLfYB{background:rgba(124,25,22,.95)}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ .index-module_navBar__fLItn{background:#9e1814}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ .index-module_navBarList__iL2jR{background:#9e1814;border-bottom:1px solid #9e1814;border-top:1px solid #9e1814}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dl:hover dt{background:#8a1f1b}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dl:hover dd{background:#6d100c;border-color:#6d100c}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dl:hover+dl dd{border-color:#8a1f1b}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dt{border:none;color:#f5f5f5}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dt a{color:#f5f5f5}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dt a.index-module_selected__6G8lk{border-bottom:2px solid #fff}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dd{border-left:1px solid #8a1f1b}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dd .index-module_navBarItem__m7wZ4 a{color:#c29391}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ dd .index-module_navBarItem__m7wZ4 a:hover{border-bottom:2px solid #fff;color:#fff}.index-module_navBarWrapper__X0DND.index-module_red__45nyJ .index-module_rightList__RchPZ .index-module_usercenter__brbF2{border-left:1px solid #8a1f1b}@keyframes index-module_phone__w9Py1{0%{transform:rotate(0)}10%{transform:rotate(-15deg)}20%{transform:rotate(15deg)}30%{transform:rotate(-15deg)}40%{transform:rotate(15deg)}50%{transform:rotate(0)}to{transform:rotate(0)}}.index-module_pageHeader__jSG5w{background:#fff}.copyright{color:#333;font-size:12px;text-align:center}.copyright a{color:#338de6;-webkit-text-decoration:none;text-decoration:none}.copyright .copyright-img{border:0;display:inline-block;vertical-align:text-bottom}.copyright .recordcode{height:16px;line-height:16px;padding-top:6px;text-align:center}.copyright .recordcode .icon-police{background:url(https://bkssl.bdimg.com/static/wiki-common/widget/component/footer/img/icon-police_5f07082.png) 0 0 no-repeat;display:inline-block;height:16px;margin-right:6px;margin-top:-4px;vertical-align:middle;width:14px}.page-footer-content{display:flex;font-size:12px;justify-content:center;width:100%}.page-footer-content:after,.page-footer-content:before{content:" ";display:table}.page-footer-content:after{clear:both}.page-footer-content .block-item{box-sizing:content-box;float:left;width:210px}.page-footer-content .block-item.fresh-block{padding:0 35px 0 5px}.page-footer-content .block-item.question-block{padding:0 35px}.page-footer-content .block-item.suggestion-block{padding:0 5px 20px 35px}.page-footer-content .block-item .block-title{color:#333;font-size:20px;line-height:1.5}.page-footer-content .block-item .block-title svg{color:#aaa;margin-right:10px}.page-footer-content .block-item .block-content{padding:5px 0 0 30px;width:210px}.page-footer-content .block-item .block-content>a{color:#666;cursor:pointer;float:left;margin-bottom:5px;position:relative;-webkit-text-decoration:none;text-decoration:none;width:90px}.page-footer-content .block-item .block-content>a:hover{color:#338de6;-webkit-text-decoration:none;text-decoration:none}.page-footer-content .block-item .block-content .block-content-new-icon{height:7px;left:52px;position:absolute;top:3px}网页新闻贴吧知道网盘图片视频地图文库资讯采购百科百度首页登录注册进入词条全站搜索帮助首页
秒懂百科
特色百科
知识专题
加入百科
百科团队
权威合作
个人中心444播报讨论上传视频自然数收藏查看我的收藏0有用+10444（四百四十四）是介于443与445之间的自然数、偶数、合数。444是可以从加法里算出来，也可以从乘法里乘出来等等。中文名444
外文名Four hundred and forty-four
大    写肆佰肆拾肆
分解式因数2²×3×37
罗马数字CDXLIV
二进制110111100
四进制12330
八进制674
十二进制310
十六进制1BC
倒数循环节3位

目录
1在数字中2数学3畜牧4佛教5化学6发展历史7文学8地理位置9工匠10测量11法律12地理环境
在数字中
播报编辑合数，正约数有1、2、3、4、6、12、37、74、111、148、222和444。过剩数，真约数和为620，盈度为176。半完全数，和为本身的其中一组约数为37、74、111、222。半完全数：74+148+222=444。不寻常数，大于平方根的素因数为37。十进制的哈沙德数。十进制的奢侈数。第54个回文数4442+1=197137可以组成一个 n2+1形态的素数过剩数（盈数）该数除了本身之外，其它约数的和为620＞444。是第四个栾数,次列数为3,位显数为4.
数学
播报编辑平方数猜想可以证明,用同一个数字1,2,3,...,9组成的十进制数,只有1,4,9是完全平方数,换句话说,在11,111,1111,...;22,222,2222,...;99,999,9999,...;中没有完全平方数。方法如下：因为完全平方数的个位只能是0，1，4，5，6，9，由此可推出22，222，……，33，333，……，77，777……，88，888……不是完全平方数。因为完全平方数的个位是奇数时，十位必是偶数，所以11，111，……，55，555……，99，999……不是完全平方数。完全平方数的个位是偶数时，十位必是奇数，所以66，666，……不是完全平方数。只剩下44，444，……需要证明了。因为444……4=4×111……1，4是完全平方数，所以若111……1是完全平方数，则444……4也是完全平方数，而前面已经证明了，111……1不是完全平方数，所以444……4 也不是完全平方数。由此可知,除了1,4,9之外,一个完全平方数至少是由两个不同的数字组成的。
畜牧
播报编辑星杂444,是加拿大雪佛公司育成的三系配套杂交鸡。据雪佛公司的资料，其72周龄产蛋量265-280 个，平均蛋重61-63 克，每千克蛋耗料2.45-2.7 千克。据1988-1989 年德国随机抽样测定结果,其生产性能为：500 日龄入舍鸡产蛋量276-279 个，平均蛋重63.2-64.6克，总蛋重17.66-17.8 千克，每千克蛋耗料2.52-2.53 千克；产蛋期存活率91.3-92.7%。 [1]
佛教
播报编辑古代著名的僧侣慧深,为了寻找一方净土，弘扬佛法,在公元444年前后踏上了东行弘法之路，比唐僧玄奘贞观元年（627年）西行求法早了近200年，比鉴真唐天宝二年（743年）东渡日本早了近300年。
化学
播报编辑纯粹的单质硫，密度1.96克/厘米³，熔点120.0℃，沸点444℃。导热性和导电性都差。性松脆，不溶于水。无定形硫主要有弹性硫，是由熔态硫迅速倾倒在冰水中所得。不稳定，可转变为晶状硫。晶状硫能溶于有机溶剂如二硫化碳中，而弹性硫只能部分溶解
发展历史
播报编辑《百家姓》成书于北宋初年，原收集中文姓氏411个，后增补到504个，其中单姓444个，复姓60个。《百家姓》读来顺口，易学好记。《百家姓》并不依照各姓氏的人口数量排序，“赵钱孙李”成为《百家姓》前四姓是因为百家姓形成于宋代吴越钱塘地区，故而宋朝皇帝赵氏、吴越国国王钱氏、吴越国王钱俶正妃孙氏以及南唐国王李氏成为百家姓前四位。另有作为儿童读物的同名图书。
文学
播报编辑《世说新语》成书于444年，是中国南朝宋时期（420-581年）产生的一部主要记述魏晋人物言谈轶事的笔记小说。是由南朝刘宋宗室临川王刘义庆（403-444年）组织一批文人编写的，梁代刘峻作注。
地理位置
播报编辑黄石国家矿山公园位于湖北省黄石市铁山区境内。著名的汉冶萍煤铁公司的“冶”即指大冶铁矿，历经百年开采，大冶铁矿东露天采场形成了落差444米的世界第一高陡边坡。2010年2月22日黄石国家矿山公园被评为国家AAAA级景区。 [3]
工匠
播报编辑鲁班是中国古代优秀的土木建筑工匠之一，也是一个相传有许多创造的杰出发明家。二千多年以来，一直被土木工匠尊奉为“祖师”，受到人们的尊敬和纪念。 最后死于公元前444年。
测量
播报编辑4开纸的尺寸是： 正度389*546 大度 444*597
法律
播报编辑第444号国务院令，公布的《禁止传销条例》中定义了什么是传销：2009年2月28日，第十一届全国人民代表大会常务委员会第七次会议通过了《中华人民共和国刑法修正案(七)》，修正案中新增了“组织领导传销罪”，规定：组织、领导以推销商品、提供服务等经营活动为名，要求参加者以缴纳费用或者购买商品、服务等方式获得加入资格，并按照一定顺序组成层级，直接或者间接以发展人员的数量作为计酬或者返利依据，引诱、胁迫参加者继续发展他人参加，骗取财物，扰乱经济社会秩序的传销活动的，处五年以下有期徒刑或者拘役，并处罚金；情节严重的，处五年以上有期徒刑，并处罚金。
地理环境
播报编辑神木县高家堡古镇是榆林市历史文化名镇，位于神、榆、佳三县区交接处的秃尾河流域，神佳公路和榆神公路的交汇处，也是周边地区重要的经济文化交流中心。全镇东西宽27.5公里，南北长23.5公里，总面积444平方公里，地形图像一只飞翔的和平鸽。 [2]新手上路成长任务编辑入门编辑规则本人编辑我有疑问内容质疑在线客服官方贴吧意见反馈投诉建议举报不良信息未通过词条申诉投诉侵权信息封禁查询与解封©2025 Baidu 使用百度前必读 | 百科协议 | 隐私政策 | 百度百科合作平台 | 京ICP证030173号 京公网安备11000002000001号window.PAGE_DATA= {"lemmaId":10753869,"lemmaTitle":"444","lemmaDesc":"自然数","lemmaType":0,"uid":265351868,"uname":"栾泽明","createTime":1164031628,"updateTime":1747943285,"isDefault":0,"isDeleted":0,"rank":1,"extData":{"LemmaId":623951,"classify":[{"id":1033566,"idPath":"1033566/1033617/1033864","leafId":1033864,"leafName":"数字","mainCategory":1,"name":"人文学科","path":"人文学科/文字语言学/数字"}],"discussion":{"relateInfo":[{"relateId":32990,"relateType":1},{"relateId":33010,"relateType":1}]},"isBaikeV6":1,"isFrontV6":1,"isSapp":0,"isWaitForPersonal":false,"is_locked":0,"kpdClassify":[{"id":337597,"name":"其他"}],"lemmaId":623951,"lemma_id":623951,"newEditor":1,"pass_count":43,"subLemmaId":623951,"updateTime":1747943285,"wapEdit":0},"extFlag":0,"versionId":640029302,"versionUid":2002229310,"versionUname":"1颗梅干","versionCreateTime":1747792059,"catalog":[{"level":1,"title":"在数字中","index":"1","uuid":"gnx6fz6rn4","height":28},{"level":1,"title":"数学","index":"2","uuid":"gnx6g16l82","height":28},{"level":1,"title":"畜牧","index":"3","uuid":"gnx6g5nihn","height":28},{"level":1,"title":"佛教","index":"4","uuid":"gnx6g5nikx","height":28},{"level":1,"title":"化学","index":"5","uuid":"gnx6g5ning","height":28},{"level":1,"title":"发展历史","index":"6","uuid":"gnx6g16l9u","height":28},{"level":1,"title":"文学","index":"7","uuid":"gnx6g16lay","height":28},{"level":1,"title":"地理位置","index":"8","uuid":"gnx6g6f9x3","height":28},{"level":1,"title":"工匠","index":"9","uuid":"gnx6g16le5","height":28},{"level":1,"title":"测量","index":"10","uuid":"gnx6g16lfs","height":28},{"level":1,"title":"法律","index":"11","uuid":"gnx6g16lgi","height":28},{"level":1,"title":"地理环境","index":"12","uuid":"gnx6g6vzja","height":28}],"abstract":[],"abstractAlbum":{"content":[{"albumId":1,"src":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","width":730,"height":483,"uuid":"ty453ri2a6gH"}],"desc":"444的概述图","total":1,"coverPic":{"albumId":1,"url":"https://bkimg.cdn.bcebos.com/pic/c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8?x-bce-process=image/resize,m_lfit,w_536,limit_1/quality,Q_70","src":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","origSrc":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","width":730,"height":483,"uuid":"ty453ri2a6gH"},"wapPic":{"src":"8694a4c27d1ed21b0ef40c3e0e38cac451da80cb91e8","origSrc":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","width":724,"height":483,"uuid":"ty454jqzsGFR"},"sharePic":{"src":"7c1ed21b0ef41bd5ad6ec42ff28c96cb39dbb7fd97e8","origSrc":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","width":483,"height":483,"uuid":"ty454qGJyqmM"}},"reference":[{"type":1,"title":"河北蛋鸡养殖规模分布(河北大型蛋鸡养鸡场)","site":"绿色山茶油","refDate":"2023-11-05","index":1,"uuid":"tUJEVMzU4jND","encodeUrl":"533aYdO6cr3_z3kATP3ezv73YS6QNtSr6rTbUbFzzqIP0XOpX5nyFIQi84ZuqrlkGwaFs5YtMYBFxbH6FBMBs6s"},{"type":1,"title":"塞上历史文化瑰宝——高家堡","site":"神木市人民政府","refDate":"2023-11-05","index":2,"uuid":"tUJH3qw8iBEL","encodeUrl":"533aYdO6cr3_z3kATKaPn_WiZ36WP96u6OXWUONzzqIP0XOpX5nyFJsq89px-fhxWgjF_4Joc9tamvutUFRE6_8QeewwRLUln3D5VDTCwLrg4YF1x40"},{"type":1,"title":"黄石市著名景点(十大排名)","site":"爱经验网","refDate":"2023-11-05","index":3,"uuid":"tUJHuAetjKXG","encodeUrl":"533aYdO6cr3_z3kATKCJy6-hNCuWZN3-u7HSA-BzzqIPmGapB5nyTcYz6ds25P9uWgjEvddyYd8dl-atFRAY6_UXceUwFuI8xTKiDw"}],"modules":{"adManager":{"data":{"miniAladdinList":1,"wapRelatedBusiness":1}},"discussion":{"showHelpEdit":1},"globalConfig":{"data":{"serviceAdLemmaCategory":[337597,337474]}},"paper":{"switch":false},"second":{"head":[{"secondId":91728729,"type":1,"form":1,"style":1,"source":1,"sourceId":"7178915438795999320","authorType":3,"platform":1,"lemma":{"relType":1,"relValue":[],"te":1774562328,"tr":["秒懂精品"],"ts":1743112727,"tw":1,"type":1,"weight":0},"score":3,"createTime":1742981366,"publishTime":1743112830,"isPay":0,"collectionId":0}]},"videos":{"data":[{"form":2,"mountType":3,"nid":"17414325836957430612","secondId":0,"source":100,"style":1,"title":"湖北亚洲第一天坑，深度达444米，镜头详细记录下了！","uuid":"i1mvgakosb"}]},"pinzhuan":{}},"albums":[{"albumId":1,"desc":"概述图册","total":1,"coverPic":{"albumId":1,"src":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","url":"https://bkimg.cdn.bcebos.com/pic/c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8?x-bce-process=image/resize,m_lfit,w_536,limit_1/quality,Q_70","width":730,"height":483,"desc":"概述图册","uuid":"ty453ri2a6gH"},"content":[{"albumId":1,"src":"c8177f3e6709c93d70cf392c3c6befdcd100bba1fee8","url":"","width":730,"height":483,"uuid":"ty453ri2a6gH"}]}],"card":{"type":243,"left":[{"key":"name","title":"中文名","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"444"}]}]},{"key":"foreignName","title":"外文名","isArray":true,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"Four hundred and forty-four"}]}]},{"key":"customDefault","title":"大写","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"肆佰肆拾肆"}]}]},{"key":"customDefault","title":"分解式因数","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"2²×3×37"}]}]},{"key":"customDefault","title":"罗马数字","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"CDXLIV"}]}]}],"right":[{"key":"customDefault","title":"二进制","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"110111100"}]}]},{"key":"customDefault","title":"四进制","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"12330"}]}]},{"key":"customDefault","title":"八进制","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"674"}]}]},{"key":"customDefault","title":"十二进制","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"310"}]}]},{"key":"customDefault","title":"十六进制","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"1BC"}]}]},{"key":"customDefault","title":"倒数循环节","isArray":false,"delimiter":"","data":[{"dataType":"text","text":[{"tag":"text","text":"3位"}]}]}]},"lemmaCnt":1,"tips":{"isPolyseme":0},"encodeLemmaId":"bef8f72639e6e987bab8633d","versionUk":"IO-acwIWcNyudsoYFzw7Yw","description":"444（四百四十四）是介于443与445之间的自然数、偶数、合数。444是可以从加法里算出来，也可以从乘法里乘出来等等。"}window.__abbaidu_2020_subidgetf||(window.__abbaidu_2020_subidgetf=function(){return"01000000"}) 444444不锈钢是一种超低碳氮、含18%铬与2%钼、高耐蚀的铁素体不锈钢。该钢种一般采用铌或钛进行稳定化，可以避免焊接后的晶间腐蚀。该钢种特别适合应用于各种水处理装置。444的屈服强度相当于碳素钢的1.5倍，玻璃钢的6倍，对于耐震，耐积雪，耐风压，耐冲击等具有出类拔萃的优良性。444铁素体不锈钢导热系数高，约为铬镍奥氏体不锈钢的130%～150%,非常适合热交换的用途．热膨胀系数小，小分队仅为铬镍奥运氏体不锈钢的60%～70%,非常适合热涨，冷缩，有热循环的条件下使用．该钢种的塑性，韧性较好，适于拉伸，轧制成型和冲压制造．特别是耐应用腐蚀是最优异的，在高的氯化物介质中耐蚀性能优于普通铁素体不锈钢和奥运会氏体不锈钢，一般不产生氯化物的应力腐蚀破裂．在加入Ti,Mo等元后，提高了耐孔蚀和缝隙腐蚀的性能．该钢种可采用焊接普通不锈钢的方法焊接．该钢种特别适合于食品加工设备，热交换器,热水器罐,蓄水槽,太阳能收集面板等.444钢种属于高合金铁素体不锈钢，与常用钢种SUS430相比：1. 含铬量高1.0%左右，且添加了合金元素钼（Mo），因此该钢种具有良好的耐点蚀、缝隙腐蚀、应力腐蚀能力，其耐蚀能力在某些领域甚至优于SUS304和SUS316。2. 添加了钛（Ti），铌（Nb），锆（Zr）等稳定化元素，因此该钢种具有良好的耐晶间腐蚀和耐高温氧化性能。 PRODUCT PARAMETERS 产品参数 化学成分成分CSiMnPSNiCrNMoTiNb最小值------17.5-1.75--最大值0.025110.040.03119.50.0352.50.80.8 上一页：S44600