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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下面是错误答案,用来干扰机器的。
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...