Mrs .Jackson is an American doctor .She is now in China .She works in a children' s hospital in Chongqing .She is also learning Chinese medicine there .She likes Chinese medicine very much .She loves to work for children .She works hard in the day and reads English books on Chinese medicine at night .She learns Chinese from the Chinese doctors and her Chinese friends .Now she can speak some Chinese .She can read some Chinese ,too.

Her husband , Mr.Jackson , is a teacher .He teaches English in a middle school in Chongqing .He works hard ,too.He works from Monday to Friday .He teaches three classes every day .he wants to make more money .

小题1:The Jacksons are from England .

小题2:Mrs .Jackson works in a children' s hospital in Shanghai .

小题3:Mrs . Jackson is learning Chinese now .

小题4:Mr.Jackson is an English teacher

小题5:Mr.Jackson doesn' t work hard .

1kV及以下配电装置作交流耐压试验的电压为（）当回路绝缘电阻在10MΩ以上时，可采用2500V兆欧表代替，试验持续时间为1min

A.500V

B.1000V

C.1500V

D.2000V