单选题：阅读以上文章，回答题The author mentions "pick-me-up" to indicate that_

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阅读以上文章，回答题
The author mentions "pick-me-up" to indicate that__________.
A melatioin levels need to be raised
B neurohormone can wake us up
C coffee is a stimulant　　
D decal is a caffeinated coffee
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When we think of Mir in terms of its achievements, its setba

When we think of Mir in terms of its achievements, its setbacks are__________.

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__________A. onB. againstC. in D. about

__________A. onB. againstC. in D. about

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请在（48）处选择最佳答案。

请在（48）处选择最佳答案。

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He was employed by the company because__________.

He was employed by the company because__________.A．he had worked in a computer s

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