对于吸湿性很强的聚合材料,相对湿度应提高到()。
A.60%~70%
B.70%~80%
C.80%~90%
D.90%以上
参考答案:C
做绕组对地交流耐压试验时,如果电压表的指示( ),电流表的指示迅速增加,则说明对地绝缘被击穿。
A.不变
B.降为零
C.升高
D.调压器
●SWOT analysis is a kind of risk identification method.If the project team chose the SO strategy,they should__(75)__.
A.make full use of the advantage and catch the opportunity
B.overcome the weakness and catch the opportunity
C.make full use of the advantage and reduce the threat
D.overcome the weakness and reduce the threat