感性负载单相半波可控整流电路中，当可控硅导通角α＝30º时，续流二极管的额定电流与晶 发布时间：2018-11-27 11:16 │ 来源：www.tikuol.com 题型：单项选择题 问题： 感性负载单相半波可控整流电路中，当可控硅导通角α＝30º时，续流二极管的额定电流与晶闸管的正向额定电流相比，应满足的关系是（）。A.等于B.大于C.小于D.不确定
题型：单项选择题 完形填空。 Chen Guanming has been carrying his home with him for the past seven years. He has done everything a man would to make it cozy. The 53-year-old farmer has spent the hottest summers and severest winters cooking, eating and 1 in his mobile home: a shaky tricycle. Chen began his journey on the three-wheel rickshaw from his 2 Jiangsu province in 2001 after hearing the news that Beijing had won the bid to host the 2008 Olympic Games. Of course, he did not forget to take his ID card, important 3 and some clothes before setting off on his mission (使命). Mission? What mission?"To promote awareness on health and the environment, just like what the Games has been doing," he says. It may 4 funny, but make no mistake that Chen is dead 5 about it."I'm a poor farmer I can't do much. But I have a healthy body. I want to use it to show the 6 of the Chinese people and the spirit of the Olympics." He would have 7 all of China except Taiwan when he reaches Beijing tonight. He speaks lively about his experiences in all the places on the mainland, 8 about an incident in Chongqing in August 2003. "I was riding up a slope and my brakes failed my rickshaw and began sliding down and overturned," he says. He had his legs broken but did not go to a hospital. Instead, he used herbs to stop the bleeding. And he 9 quietly for some days for his legs to rejoin. Looking at the man, you wouldn't want to believe he has crossed so many mountains and 10 in his tricycle. But you look at the piles of evidence and become a silent admirer of this determined soul. ( )1. A. working ( )2. A. native ( )3. A. equipment ( )4. A. seem ( )5. A. serious ( )6. A. power ( )7. A. covered ( )8. A. extremely ( )9. A. slept ( )10. A. lakes B. playing B. familiar B. supplies B. sound B. careful B. energy B. drove B. especially B. sat B. rivers C. sleeping C. famous C. furniture C. look C. practical C. strength C. run C. actually C. rested C. valleys D. living D. noble D. documents D. listen D. optimistic D. authority D. walked D. exactly D. lay D. road 查看答案
