发电机直流耐压的意义?
参考答案:
在直流泄漏和直流耐压的试验过程中,可以从电压和电流的对应关系中观察绝缘状态,在大多数情况下,可以在绝缘尚未击穿前就能发现或找出缺陷。
( На вопрос 1 )
A.Он русский студент
B.Он китайский учитель
C.Он русский преподаватель.
1. How about taking a bus to school?(改为同义句)
___________ __________ take a bus to school?
2. What an interesting film it is! (改为同义句)
__________ __________ the film is !
3. Why don't you buy her a bike?(改为同义句)
__________ __________ __________ a bike __________ her?
4. He could swim when he was 7 years old. (改为同义句)
He could swim__________ __________ __________ __________7.
5. He should buy a coat for his father. (就画线部分提问)
__________ __________he buy for his father?