检查电流表时，应将被试电流表与标准电流表以及可变电阻（）在一起，比较两个电流表的读数。
A.并联
B.串联
C.混联
D.不接
参考答案：B
You cannot say that the desire for material advantage is the basic motive in human behaviors; there are many exceptions for this.
一般，电气化铁道钢轨与管道间距（）m即可满足管道防腐要求。
A.2
B.3
C.5
D.10
