根据微小误差准则,测量数据通常按被测量允许误差的()。
A.0.05
B.0.1
C.0.5
参考答案:B
On no account _______ out of the reading-room.
A.may these magazines take
B.may these magazines be taken
C.these magazines be taken
D.these magazines may take
对额定电压为0.6/1kV的电缆线路,可用()V或()V兆欧表测量导体对地绝缘电阻代替直流耐压试验。
A.500;1500
B.1000;2500
C.2000;2500