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【简答题】
确定导线截面,须按允许电压损失和发热条件进行校验。()
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皮皮学刷刷变学霸
举一反三
【单选题】听力原文：W: I am totally exhausted. I stayed up the whole night studying for the final examination. M: What have you done during your previous study time? Q: What does the man imply? (13)
A.
She has wasted much study time.
B.
She sleeps too much.
C.
Staying up is bad for health.
D.
She is an excellent student.