直流系统降压运行的范围是（）。 A.65-99% B.60-99% C.70-99% 发布时间：2018-11-05 10:03 │ 来源：www.tikuol.com 题型：单项选择题 问题： 直流系统降压运行的范围是（）。A.65-99%B.60-99%C.70-99%D.80-99%
题型：单项选择题 选用方框内的动词的适当形式填空:, be, have, drive, take, do, break, sing, go, stop, tell, finish, come1. What _____ he usually _____ on Sundays?2. Uncle Li _____ to Zhenzhen yesterday. He _____ back next week. 3. Grandpa _____ me an interesting story last night. 4. _____ your parents _____ working very late that day?5. He came into the room and _____ a song for us all. 6. It _____ me half an hour to finish the work yesterday evening. 7. —_____ they _____ a get-together over there? —Yes, they are. 8. _____ the girl born in July or June?9. He _____ goodbye to his father and left the home. 10. The man _____ the car very carelessly, so he had an accident. 查看答案