题型：问答题 简答题 2010年10月9日上午，“嫦娥二号”卫星成功实施第三次制动，也是最后一次制动，卫星进入了一个周期大约为118分钟的环月圆形轨道．“嫦娥二号”将在此“使命轨道”上进行科学探测活动，为后续探月奠定良好的基础．若已知卫星绕月运行的轨道半径为r，周期为T，万有引力常量为G．由此可以计算出（ ）A．卫星的质量B．卫星所受的万有引力C．月球的质量D．月球的密度 查看答案
题型：问答题 简答题 完形填空。 The wisdom my 77-year-old father has passed on to me came more through osmosis (潜移默化) than lectures. My dad's 1 shines through all my life. Old age hasn't 2 him, mainly because he doesn't think almost-80 is old. He had ever trained for a charity (慈善) 3 across the Hudson River in New York. He wore his custom-fitted diving suit, but he still got so 4 . We warmed him and wrapped him in a sleeping bag. "Oh, 5 , it isn't that bad," he'd say, "I am fine. " He always is. He did 6 the Hudson swim a month later. If you ask my father whether or not his life has been hard, he will say he is 7 . He means the kind of happiness that comes from 8 a well-cooked family meal, taking a good long run or growing a perfect tomato. Did I mention that he used to run marathons before his knee replacement surgery? He's the one who 9 me I could do it, too. " 10 can run a marathon," he said, "as long as you keep training. " My father was born in 1933. His childhood took a 11 at the beginning of World War Ⅱ : His father joined the French Army and was 12 by the Germans and spent the war in a prison camp. My dad and his mother and sister were shipped off to New Jersey to live with relatives. His mother 13 from depression, and Dad went to boarding school in New England from the sixth grade on. Yet in all Dad's dinner table 14 , there have been many times when he turned them into 15 stories. After a family dinner the other night, Papa Bob advised us to try the skydiving 16 "Sixty-five seconds of free falling," he said. "I 17 it. I should have been a paratrooper" He loves getting cards in the mail, and usually I'm 18 , so instead I call him on Father's Day. But this year I've 19 to be early for once. I want to let him know how much he 20 to me. Dad, thank you-for all of it and mostly for your enduring faith that everything will be OK.( )1. A. ability ( )2. A. comforted ( )3. A. swim ( )4. A. warm ( )5. A. come out ( )6. A. complete ( )7. A. ordinary ( )8. A. sharing ( )9. A. informed ( )10. A. Anyone ( )11. A. step ( )12. A. killed ( )13. A. resulted ( )14. A. experiences ( )15. A. foolish ( )16. A. chance ( )17. A. loved ( )18. A. late ( )19. A. refused ( )20. A. occurs B. gentleness B. slowed B. donation B. sad B. come back B. stop B. young B. containing B. appointed B. Someone B. turn B. caught B. judged B. manners B. great B. adventure B. hated B. early B. permitted B. possesses C. optimism C. punished C. volunteer C. calm C. come over C. delay C. disabled C. destroying C. insisted C. None C. sigh C. driven C. suffered C. stories C. short C. visit C. used C. noisy C. allowed C. means D. humor D. accused D. activity D. cold D. come on D. celebrate D. lucky D. buying D. convinced D. Others D. dream D. fired D. separated D. news D. aggressive D. movement D. assessed D. quiet D. decided D. proves 查看答案
题型：问答题 简答题 调车手信号的显示，昼间展开的绿色信号旗在下部左右摇动，其含义为（）。A、发车指示信号B、列车互检通告信号C、指挥机车向显示人方向来的信号D、指挥机车向显示人反方向去的信号 查看答案
