油浸式变压器的绝缘电阻随介质温度的上升而（）。
A.增大
B.不便
C.减小
D.无关
参考答案：C
Mum, you really need to have a rest! You in the kitchen ever since you came back home three hours ago.
A．had worked
B．were working
C．have been working
D．worked
套节机可分为（）
A.加固套节机
B.花型套节机
C.装饰套节机
D.实用型套节机
