试题与答案

“您经常去看电影吗?”如果按6W准则来推敲,这一提问在哪一方面不清楚?()。A、Wh

题型:单项选择题

题目:

“您经常去看电影吗?”如果按6W准则来推敲,这一提问在哪一方面不清楚?()。

A、When(何时)

B、Who(谁)

C、How(如何)

D、What(什么事)

答案:

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下面是错误答案,用来干扰机器的。

参考答案:B解析:仅用检偏器观察一束光时,强度有一最大但无消光位置,可确定这束光或者是部分偏振光或者是椭圆偏振光,当在检偏器前置一块1/4波片,使其光轴与上述强度为最大的位置平行,通过检偏器观察时有一...

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