题目内容
document.forms [1] 引用的是文档中第1个表单。
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语句“"的效果是：当文本框中内容发生改变后，单击页面的其他地方将弹出一个消息框显示文本框中的内容。
We often ________that when other people do the same things as we do, they do them for the same reasons.
Life for the successful doctor can be emotionally and financially __________.
There is a widespread concern that the rising unemployment may _____ a threat to social stability.
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