21、对下列代码解析正确的是(_____)。 <style type="text/css"> body{ margin:0 } div{float:left; margin-left:10px; width:200px; height:200px; border:1px solid red } </style>

下列选项中，不属于BOX的Border属性的有（）。 A: border—width B: border—height C: border—color D: border—size E: border—style

HTML5画布API中创建一个带有1像素宽、黑色、实线边框的画布，以下哪句代码正确？（ ）。 A: <;canvas id=”myCanvas” style=”border:1 black solid”>;<;/canvas>; B: <;canvas id=”myCanvas” style=”border:1 black dashed”>;<;/canvas>; C: <;canvas id=”myCanvas” style=”border:1px black dashed”>;<;/canvas>; D: <;canvas id=”myCanvas” style=”border:1px black solid”>;<;/canvas>;

In the full block style and simplified style, all the parts should begin from the left margin.

下面对页面元素边框设置不正确的是( ) A: border-left-style: double; B: border: 2px green dashed; C: border-color: red; D: border-top-width: 2px 4px;

border的属性包括 A: color B: width C: style D: height

The European style, also called the continental style,is to hold the fork in the right hand and the knife in the left throughout the mealtime.

下列哪个css属性能够设置元素为左边浮动() A: float:left B: style:left C: font:left D: display:left

在下图中，能够用Trim命令修剪掉的线段是（ ）。<p style="text-align: left;<img width="80" height="100" src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201901/98b39a53cb9a4d04b60f602ce9f45551.png" border="0" vspace="0

将某二维图形整体放大2倍，其变换矩阵可写为：<p style="text-align: left;<img width="70" height="60" src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201908/b188ae02b37b4bd8bd2f7ac8b69f7a62.png" border="0" vspace="0