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<pinstanceof是判断对象是否是某种类型的，我们可以看下下面的代码：</p<divid"scid:9D7513F9C04C4721824A2B34F0212519:4f2d1c23092c4b0f888f8ada43241043"class"wlWriterEditableSmartContent"style"flo

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