shuttle in

       大家好，今天我来为大家详细地介绍一下关于shuttle in的问题。以下是我对这个问题的总结和归纳，希望能对大家有所帮助。

1.How can an astronaut in a space shuttle drop an object vertally to earth 物理求答案？

2.求一篇英语小短文Life In the future

How can an astronaut in a space shuttle drop an object vertally to earth 物理求答案？

       第一个问题 宇航员在太空中是绕地球做圆周运动的 求出他的速度V 让后将物体向与他运动方向相反的方向以速度V抛出即可 这样物体的相对地球的速度即为0 这样物体就会垂直下落（当然这只是其中一种方法）

       第二个问题 因为速度不同 产生的摩擦力不同 （这个没把握）

       第三个问题 逃逸速度取决于行星的质量和与行星中心的距离 所以11.2只是针对地图表面的物体

求一篇英语小短文Life In the future

       There is an effort to have real progress.

       Slowly open wings, dew gently across, formed a beautiful arc trace. Gently shaking wings, hairs were shaking in the wind. The tentacles of the head shook into a curling wand.

       Every time a butterfly, after a long and hard process. From the beginning of a caterpillar, it must avoid danger, learn to hide, to earn grab. The own wrapped tightly, think of it in which will be how lonely, how boring. When the real transformation imminent when, through a difficult it has finally launched the most beautiful, the most dazzling rays of light! Even, its youth as the dew of time is very short.Bitter, man. I silently endured. After every exam, score report, however, every time I score is not ideal. I have pressure, therefore, I would like to once again put on my shirt to struggle. Just for a better tomorrow.

       After a year of Time flies like a shuttle. in a short time, I found my progress! By 200 progress the original to the top one hundred, I also should go to my boat. Fate is always joking with me, the first test is in fast after my Chinese, I really got the first! Good fun, and really worry, I can still keep up? I'm not sure, but I believe that everything is possible! Later, due to adapt to the new learning environment, I will improve my learning method, what do not understand just ask! Together, together the struggle in the competition, to go towards a better tomorrow. Today I finally score first row on the class, I want to keep it!

       We are all one by one and caterpillar, we do not have the innate beauty, we are fighting, we need to struggle and efforts! When you become a beautiful butterfly, look back through your journey, you will find, there are efforts to have real progress!

       The life has no future, understanding my person, you at?

       The a common evening, having no can go of I carry an only double shoulders to wrap aimless 漂 at this city wear, wear shuttle in the cars of the continuous flow with vanish quickly of in the crowd, looking at a car to get on the car those unfamiliar faces appear constantly to disappear constantly, sometimes leaving them to be so near, but feel soul be separated a long distance ten thousand in.

       The know when, have already arrived at the most prosperous business district in this city, although isn't an evening of weekend, the person who comes shopping is still a lot of, their interest comes in and go out general merchandise market full of lifely and multiplies by elevator multifariously to rush about up and down. the high and big office building the body is deeply bright, keeping put under the dazzling light cloudy regions, the neon sell HUA TONG2 and mendicant a child to have already can'ted see a trace and shadow by lamplight, selling to be 劳 spread the huge advertisement voice in the television continuously with be willing to in virtuous chicken store, dark of there is often lovers in the corner over there the intense emotion kiss, Mr. hands over a first-class bus of website of the person is more and more, on the square,store the ex- rest area sit of very full is all person, in this rock forest, each nature and mans are writing freely an own youth,own life extravagantly in same way.

       The looks forward to the life of the 漂 , 35 good friends carry the north bound bag on 35 good friends back, the footprint of the convenient youth walks through the four seasons and walks in the singing everyplace, permissive the soul is aimless to drift on water. however reality life but use an invisible of the fetter lock the oneself to get up, paying price but DOing not get repay.

       It there is a railroad that stretch toward far-away place in the novel of the Annie's treasure, does it have an end? Annie say that have no, is Anne regardless,blue,Joe,don't the 央 or Anne living and all have never walked to an end, all having never had already let the soul anchor of opportunity, so their can along the direction of the railroad stopped of stand down to go to, keep till the last life to be like flower petal similar fade, they will not walk to the end of the railroad, can never.

       The I say, that railroad has an end. 《make appointment finally 》medium drift on water where everywhere after, die in after the expensive state a strange country primary school taught half year book difficult produce, she has already walked to the end of the railroad by half year, mooring at the strange country to the soul in, then peaceful of leave.《seven years 》in blue finished own life nearby in the lover, she say, I destine and don't belong to this world, this world nots agree with to match my dream. she used life to does an oneself to like to do in time of the last years of matter, walk too long,too far, feel tired, the courier station that wants to seek insulations in and this worlds let an own soul take a rest.

       The Annie writes to the love to have no future in 《 seven years 》 of the postscript, I

       The life in the future

       mean to say a life to have no future.

       The wants me to choose a kind of life style, I return to choice blue treat the first half segment of[with] living manner, is the affair that the oneself likes to do as far as possible and possibly.the life have no future, the life lies in a feeling, walk of long,tired, seek a place to let the soul grind to a stop once, then continue to walk faster, don't let the oneself disappear in have no voice.

       好了，今天关于“shuttle in”的话题就到这里了。希望大家通过我的介绍对“shuttle in”有更全面、深入的认识，并且能够在今后的学习中更好地运用所学知识。