选择题:49. –I don’t know which major I should choose to s

题目内容:
49. –I don’t know which major I should choose to study. – _________________(本题1.0分)
A、 I have no idea.
B、 Have you ever thought of computer science?
C、 You ask a wrong person.
D、 You don’t know at this moment
参考答案:

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[简答题,10分] 解释蓄电池电解液比重低于或高于正常值的故障特征、产生原因、处理方法?

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