选择题:Do you think they have as many books as they’ve de

题目内容:
Do you think they have as many books as they’ve described ? —Well , in my opinion , they have few books , if _____(本题1.0分)
A、 some
B、 any
C、 .none
D、 many
参考答案:

发热会使导体机械强度下降,绝缘性能降低,接触电阻增大等。为了保证导体可靠地工作,按照有关规定,导体正

发热会使导体机械强度下降,绝缘性能降低,接触电阻增大等。为了保证导体可靠地工作,按照有关规定,导体正常工作温度不应超过(),导体通过短路电流时,短路最高允许温度

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