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PrintScrecn键为大小写转换键。 ()

A. 正确
B. 错误

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需睡前服用的药物是（）。

给药方便、常用、安全可用（）。

What is wrong with making a film by setting up a camera before the stage？
[A] Fewer and fewer people will go to the theatre.
[B] The audience cannot see what is going on on the stage.
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[D] The powerful camera cannot be made good use of.

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