问题
单项选择题
着陆时使用的襟翼偏度大,可以().
A.使飞机接地速度小,同时飞机的空气阻力大,易于减速
B.增大飞机升力,使复飞更容易
C.增大飞机的升阻比
答案
参考答案:A
着陆时使用的襟翼偏度大,可以().
A.使飞机接地速度小,同时飞机的空气阻力大,易于减速
B.增大飞机升力,使复飞更容易
C.增大飞机的升阻比
参考答案:A
论坛盘点 明理导行
在光明中学校园网的论坛上,有以下一些帖子,请你根据帖子内容,运用所学知识在跟帖栏目中简要写出其给我们的启示。(6分)
网名 | 帖子 | 跟帖(启示) |
春风 | 扬州市中学生徐砺寒骑车上学途中不慎刮蹭一辆路边豪车,在原地等待车主半小时无果的情况下,留下一张写有赔偿联系方式的道歉纸条。网 | (1) |
夏雨 | 养儿“防”老(摘自《时事》第5期) | (2) |
秋云 | 全国有110多个科研院所直接承担了载人航天核心研制建设任务,更有难以计数的分系统、子系统或配套单位共同参与,为天宫一号与神舟九号载人交会对接圆满成功提供有力的保障。 | (3) |
完形填空。 | ||||
There are many different ways of seeing a town for the first time. One of them is to walk around it, guide- book 1 hand. Of course, we may 2 with our guide-books the history and 3 developments of a town and get to know them. 4 then, if we take out time and 5 in a town for a while, we may get to know it better. When we 6 it as a whole, we begin to have some 7 , which even the best guide-books do not answer. Why is the town just 8 this, this shape, this plan, this size? Why do its streets 9 in this particular way, and not in any 10 why? Here even the best guide-book 11 us. One can't find in it the information about how a town has developed to the 12 appearance. It may not describe the original (最初的) 13 of a town. However, one may get some idea of what I 14 look like by walking around the town. One can also imagine 15 the town was first planned and . Then one can learn more about in what direction the town 16 to develop. What is the 17 of studying towns in the way? For me, it is 18 that one gets a greater depth of pleasure by visiting and seeing a town with one's own eyes. A 19 visit to a town may help one better understand why it is attractive 20 just reading about it in a guide-book. | ||||
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