试题与答案

CTCS-2车站列控中心机柜UPS持续供电时间不小于()。A.20min B.25m

题型:单项选择题

题目:

CTCS-2车站列控中心机柜UPS持续供电时间不小于()。

A.20min

B.25min

C.30min

D.50min

答案:

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参考答案:D解析:[听力原文]M: Do you think you feel energetic enough to walk to our study group session tonight W: If there is one! I guess you haven’t heard the weather...

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