WhatwasBurned'sproblem?()
A. He was in need of a large sum of money.
B. His friend didnt return the money borrowed from him.
C. He couldnt return the money borrowed from his friend.
D. His friend didnt want to lend him money
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当电流较小时,用电动励灭弧时的点动力很小。考虑它有两个断口,一般适用于直流接触器作灭弧装置()
A. 对
B. 错
DF4D型机车的水温继电器使得当柴油机的高温水系统出口冷却水的温度超过95℃时,柴油机卸载运行()
A. 对
B. 错
进出口商品的报检人提出复验申请应当自收到海关的检验结果之日起内提出()
A.7日
B.15日
C.30日
D.60日
使用兆欧表测量饱和电阻值、即使是设备带电也能进行测量()
A. 对
B. 错