JQuery中的 addClass 方法可以位元素添加样式类，该方法也可以一次添加多个类名。
$('div').addClass('class1 class2'); (adsbygoogle = window.adsbygoogle || []).push({});
来源：https://www.02405.com/archives/8040
JQuery 为元素添加多个样式类 – 珊瑚贝
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