问题
单项选择题
SF-3102电动轮的整流器是()整流器。
A.单相桥式整流器
B.三相桥式整流器
C.两相桥式整流器
D.多相桥式整流器
答案
参考答案:B
SF-3102电动轮的整流器是()整流器。
A.单相桥式整流器
B.三相桥式整流器
C.两相桥式整流器
D.多相桥式整流器
参考答案:B
阅读下面短文,用方框内所给的适当形式填入相应的空白处,使短文意思完整。(每个词只能用一次)(本题共10小题;每小题2分,满分20分)
A lot of people want to work in TV news, so you have to be energetic and___59___. You have to show that you can do it. You must learn how to use a video camera, to write reports, and to speak to the camera. What’s the best __60__to learn? Your school or college TV station is a good place to start, __61__you have to get a job! Most people __62__with an unpaid job, so they can learn. The best place to learn is at a small station. There aren’t many people, and as a result, you get better__63___. I had an unpaid job at a small station, and one night, when everyone__64__ was ill, I read the news on air. I did well, and as a result, I got my first __65__job! |