变压器交接试验时,1000kV特高压变压器局放测量电压为1.3Um/√3,主体变压器低压绕组不大于()pC。
A.100
B.200
C.300
D.500
参考答案:C
棉麻粉尘可引起()
A.棉尘病
B.石棉肺
C.农民肺
D.外源性变应肺泡炎
E.云母尘肺
Children need friends()their own age to play with.
A. of
B. for
C. in
D. at