以下哪项是类实例化的语句?( )。 A: varName ClassName=new varName() B: ClassName varName=new ClassName(new ClassName) C: ClassName varName=ClassName() D: ClassName varName=new ClassName()

下列选项中，属于JavaScript中设置元素样式的属性有（ ） A: className B: offsetWidth C: offsetHeight D: style

页面上有一个按钮btn，同时定义好了一个类样式（按钮图片样式表btnPic），那么使用（）就可以实现背景图片的改变。 A: onmouseover="className=btnPic" B: onmouseover="this.className=btnPic" C: onmouseover="this.style.className=btnPic" D: this.btn.style.className="btnPic"

下列无效的CSS选择器的是( ) A: className a B: className .a C: a.className a D: a.className .a E: span[data-type=1] F: className:first-child G: div:before

页面上有一个文本框和一个类change，change可以改变文本框的边框样式，那么使用下面的（）就可以实现当光标移到文本框上时，文本框的边框样式产生变化。 A: onmouseover=”className=’change’”; B: onmouseover=”this.className=’change’”; C: onmouseover=”this.style.className=’change’”; D: onmouseover=”this.style.border=’solid1px E: ff0000’”;

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‎ CSS 指的是？‏ A: Colorful Style Sheets B: Computer Style Sheets C: Cascading Style Sheets D: Creative Style Sheets

CSS 指的是（ ） 。 A: Computer Style Sheets B: Creative Style Sheets C: Cascading Style Sheets D: Creative Sheets Style

What is the basic style of the official art academy in the Qing Dynasty?( ) A: Fresh and natural style B: Luxurious and elegant style C: Quiet and light style D: Style with abundant interest and charm

6. CSS指的是（ ）？ A: Computer Style Sheets B: Cascading Style Sheets C: Creative Style Sheets D: Colorful Style Sheets