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问题 单项选择题

为检查大中型变压器是否受潮、油质劣化、绝缘老化及严重局部缺陷，应进行（）测试。

A.绝缘电阻

B.吸收比

C.介质损失角正切值

D.泄漏电流

答案

参考答案：C

单项选择题

Man: Though we didn't win the game, we were satisfied with our performance.Woman: You did a great job, you almost beat the world champions. It's a real surprise to many people.Question: What do we learn from this conversation

A．They both enjoyed watching the game.

B．The man thought the results were beyond their expectations.

C．They both felt good about the results of the game.

D．People were surprised at their wining the game.
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单项选择题

802.1X认证是基于（）

A.路由协议

B.端口

C.VTP

D.VLAN
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