假设地球质量不变，而地球半径增大到原来的2倍，那么从地球发射的人造地球卫星第一宇 发布时间：2017-06-09 14:27 │ 来源：www.tikuol.com 题型：选择题 问题： 假设地球质量不变，而地球半径增大到原来的2倍，那么从地球发射的人造地球卫星第一宇宙速度(环绕速度)大小应为原来的A．倍B．倍C．倍D．2倍
题型：选择题 下列各句中，没有语病的一句是[ ]A．有媒体人士表示，众多网友对，反映了受众对语言的新期待。亲切、平民、通俗易懂的语辞,甚至包括网络流行语,都是被今天的受众喜闻乐见的。B．“蚁族”，是对“大学毕业生低收入聚居群体”的特别称谓，这个词可能会像“知青”、“下岗工人”、“农民工”一样成为理解中国社会变迁的词语之一。”C．作家谢朝平因写作、出版反映三门峡移民问题的《大迁徙》，在北京的家中被渭南警方抓走，以涉嫌，引发社会各界强烈反应。D．武汉市纪委书记车延高的诗集《向往温暖》摘得鲁迅文学奖诗歌奖项，引起网友热烈讨论，被网友大规模仿写。 查看答案
题型：选择题 完形填空。 A man who knows how to write a personal letter has a very powerful tool. A letter can be enjoyed, readand 1 . It can set up a warm conversation between two people far apart (远离的); it can keep a 2 with very little effort. I will give 3 . A few years ago my older brother and I were not getting 4 . We had been close as 5 but had grown apart. Our meetings were not 6 ; our conversation was filled with arguments and quarrels; and every effort to clear the air seemed to only 7 our misunderstanding. Then he 8 a small island in the Caribbean and we 9 touch. One day he wrote me a letter. He described his island and its people, told me what he was doing, said how he felt, and encouraged me to 10 . Rereading the letter, I was 11 by its humor and clever expressions. These were all qualities for which I had 12 respected my older brother but 13 he nolonger had them. I had never known he could write so 14 . And with that one letter we became friends 15 . It might never have occurred to 16 to write me if he had not been in a place where there were no 17 . For him, writing was a necessity. It also turned out to be the best way for us to get back in touch. Becausewe live in an age of 18 communication (通讯), people often 19 that they don't always have to phone or email. They have a 20 . And that is to write. ( )1. A. received ( )2. A. record ( )3. A. an example ( )4. A. through ( )5. A. brothers ( )6. A. normal ( )7. A. deepen ( )8. A. toured ( )9. A. lost ( )10. A. think ( )11. A. driven ( )12. A. never ( )13. A. realized ( )14. A. well ( )15. A. later ( )16. A. us ( )17. A. mail services ( )18. A. poor ( )19. A. believe ( )20. A. habit B. rewritten B. promise B. a lesson B. together B. children B. necessary B. start B. stopped over B. kept in B. write B. beaten B. seldom B. judged B. often B. anyhow B. anyone else B. transport services B. easy B. decide B. choice C. returned C. friendship C. an experience C. along C. fellows C. pleasant C. express C. reached C. needed C. enjoy C. surprised C. sometimes C. thought C. much C. too C. someone C. phones C. popular C. argue C. method D. reread D. secret D. a talk D. away D. classmates D. possible D. settle D. moved to D. got in D. read D. honored D. once D. expected D. soon D. again D. my brother D. relatives D. busy D. forget D. plan 查看答案
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