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【简答题】
The social competition is now intense, so the young people in college should prepare themselves well. What do you think is the best preparation for future, to be competitive or to be cooperative? Write a composition of about 200 words on the following topic: To Be Competitive or to Be Cooperative? You are to write in three parts. In the first part, state specifically what your opinion is. In the second part, provide one or two reasons to support your opinion. In the last part, bring what you have written to a natural conclusion or make a summary. Marks will be awarded for content, organization, language and appropriateness. Failure to follow the instructions may result in a loss of marks.
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A.
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B.
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C.
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D.
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A.
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错误
【判断题】若离心泵的实际安装高度大于允许安装高度,在操作中会发生气蚀现象。
A.
正确
B.
错误
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【单选题】How many total valence electrons should be used when drawing the Lewis structure of ?
A.
17
B.
24
C.
28
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44
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