对MySQL InnoDB引擎的索引了解吗？ ...

只有左右框 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 <div align="right"> <div style="width:47%; border-style:solid; border-width:1px; border-radius:15px"> <div style="text-align:center;margin:5%"> 这是右边 </div> </div> </div> <div align="left"> <div style="width:47%; border-style:solid; border-width:1px; border-radius:15px"> <div style="text-align:center;margin:5%"> 这是左边 </div> </div> </div> 带有箭头的左右框 写法一 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 <style type="text/css"> .div-diabox{ width: 60%; border-style: solid; border-width: 1px; border-radius: 16px; position: relative; padding:30px; text-align:center } .div-diabox .arrow-right-out{ width: 0px; height: 0px; border-style: solid; border-color: transparent transparent transparent black; border-width: 10px; position: absolute; top: 10px; right: -20px; } .div-diabox .arrow-right-in{ width: 0px; height: 0px; border-style: solid; border-color: transparent transparent transparent white; border-width: 10px; position: absolute; top: 10px; right: -19px; } .div-diabox .arrow-left-out{ width: 0px; height: 0px; border-style: solid; border-color: transparent black transparent transparent; border-width: 10px; position: absolute; top: 10px; left: -20px; } .div-diabox .arrow-left-in{ width: 0px; height: 0px; border-style: solid; border-color: transparent white transparent transparent; border-width: 10px; position: absolute; top: 10px; left: -19px; } </style> <div align="right"> <div class="div-diabox"> <span class="arrow-right-out"></span> <span class="arrow-right-in"></span> 右边 </div> </div> <br/> <div align="left"> <div class="div-diabox"> <span class="arrow-left-out"/></span> <span class="arrow-left-in"></span> 左边 </div> </div> <br/> 写法二 ...

1 du -sh ./*

apt 只下载包及其依赖而不安装 1 2 # sudo apt-get install -d <软件包> sudo apt-get install -d vlc ...

腾讯会议不支持 Wayland 进入 /opt/wemeet 目录 编辑 wemeetapp.sh 文件 在 export QT_PLUGIN_PATH="${HERE}/plugins" 后添加如下三行代码后保存 1 2 3 export XDG_SESSION_TYPE=x11 export QT_QPA_PLATFORM=xcb unset WAYLAND_DISPLAY 重启即可 缺点 由于 Wayland 的限制，腾讯会议现在无法捕捉到屏幕，自然“共享屏幕”也就失效了，实际效果是当尝试共享屏幕时，共享的是 pure black