中国大学MOOC: If we want to show that there is a problem against a certain research background, we can use

Which one is not the function of the beginning of a narration ( ). A: Show some background information. B: Set the scene. C: Present the theme. D: Tell how the event developed step by step.

What are the three types of background? A: interpretative background B: contrastive background C: explanative background D: analytical background

通过（）属性，可以设置表格的背景颜色、背景图像。 A: background B: tr- background C: table- background D: td- background

We can put soft light paper before background light to ______. A: enhance the quality of the background screen B: reduce the amount of wrinkle on background screen C: make background light bright D: make the background light soft

‎Vue中如何通过内联样式设置背景色为黑色‍ A: :style="{background:'red'}" B: style="{background:'red'}" C: class="{background:'red'}" D: :styles="{background:black}"

以下语法格式正确的是（）。 A: input：disabled{background：red；} B: input：enable{background：green；} C: input：checked{background：green；} D: input：selected{background：red；}

程序的运行结果是（ ）[img=171x422]17d6045d3a8d17f.png[/img] A: B1::show();B1::show();B1::show(); B: B1::show();B2::show();D::show(); C: B1::show();B2::show();B2::show() D: B1::show();B2::show();B1::show();

下列哪个是（ ）设置背景图片（bg.gif）水平方向平铺? A: background:url(bg.gif) repeat-x; B: background:url(bg.gif) repeat-y; C: background:url(bg.gif) no-repeat; D: background:url(bg.gif);

以下程序正确的是（） A: <;body background=url("img/123.jpg")>; B: <;body background:url("img/123.jpg")>; C: <;body background="url('img/123.jpg')">; D: <;body background="img/123.jpg">;