首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
考研
If someone asked you.“What color is the sky?”I expect that you would answer.“Blue.”I am afraid that you would be wrong.The sky h
If someone asked you.“What color is the sky?”I expect that you would answer.“Blue.”I am afraid that you would be wrong.The sky h
admin
2013-05-24
92
问题
If someone asked you.“What color is the sky?”I expect that you would answer.“Blue.”I am afraid that you would be wrong.The sky has no color.When we see blue,we are looking at blue sunlight.The sunlight is shining on little bits of dust in the air.
We know that there is air all around the world.We could not breathe without air.Airplanes could not fly without air.They need air to lift their wings.Airplanes cannot fly very high because as they go higher the air gets thinner.If we go far enough away from the earth,we find there is no air.What is the sky?The sky is space.In this space there is nothing except the sun,the moon and all the stars.
Scientists have always wanted to know more about the other worlds in the space.They have looked at them through telescopes and in this way they have found out a great deal.
The moon is about 384,000 kilometers away from the earth.An airplane cannot fly to the moon but there is a thing that can fly even when there is no air.This is rocket.
I aln sure that you are asking.“How does a rocket fly?”If you want to know,get a balloon and then blow it up until it is quite big.Do not tie up the neck of the balloon.Let go! The balloon will fly off through the air very quickly.The air inside the balloon tries to get out. It rushes out through neck of the ball and this pushes the balloon through the air.It does not need wings like an air plane.
This is how a rocket works.It is not made of rubber like a balloon,of course.It is made of metal.The metal must not be heavy but it must be very strong.There is gas inside the rocket which is made very hot.When it rushes out of the end of the rocket,the rocket is pushed up into the air.
Rockets can fly far out into space.Rockets with men inside them have already reached the moon.Several rockets,without men inside them,have been sent to other worlds much farther away.
One day rockets may be able to go anywhere in the space.
A rocket is pushed up into the air when__________.
选项
A、hot gas rushes out of its head.
B、it is powered by gas.
C、hot gas rushes out of its bottom.
D、hot gas rushes out of its neck.
答案
C
解析
细节题。文章倒数第二段的最后一句话可知C为正确选项。
转载请注明原文地址:https://kaotiyun.com/show/9Cii777K
本试题收录于:
GCT工程硕士(英语)题库专业硕士分类
0
GCT工程硕士(英语)
专业硕士
相关试题推荐
I’d______hisreputationwithotherfarmersandbusinesspeopleinthecommunity,andthenmakeadecisionaboutwhetherornot
PresidentCoolidge’sstatement,"ThebusinessofAmericaisbusiness",stillpointstoanimportanttruthtoday—thatbusinessin
Althoughheroesmaycomefromdifferentcultures,they".Theauthorconcludesthathistoricalchangeswould______.
Accordingtothepassage,U.S.leadershipinpublicrelationsisbeingthreatenedbecauseWhatlessonmightthePRindustrytak
Duringthepastgeneration,theAmericanmiddle-classfamilythatoncecouldcountonhardworkandfairplaytokeepitselffin
Manager:______Secretary:Someonedidcall.ButIcanhardlyunderstandthedialectheused.
A:I’mafraidIhavespilledsomecoffeeonthetablecloth.B:______.
Inordertobechosen,applicantsmustsendin______beforeNov.30,2006.JournalofBiomaterialsResearchwillpublish_____
Therewasnotickets______forFriday’sperformance.
Receptionist:______Caller:Hello.I’dliketobookadouble-roomfornextweekend.
随机试题
男性,70岁,因急性广泛前壁心肌梗死入院。查体:血压95//50mmHg,高枕卧位,双侧中下肺均可闻水泡音,心律整,心率108次/分,可闻S,奔马律,四肢末梢皮温正常。胸片示:心脏不大,主动脉迂曲钙化,两肺门阴影增大、模糊。按Killip分级,该患者心功能
非霍奇金淋巴瘤多发生于
目前认为,骨结合
根据我国行政诉讼法规定,行政机关在作出具体行政行为后被撤销的,应以()为被告
房地产登记信息的公开性和登记内容的可信赖性,有利于房地产交易()的减少。
项目监理机构与( )的协调是监理工作的重点和难点。
普通住宅的屋面防水等级通常分为()级。
常见的打印机有()。
该公司进口汽车,需凭下列哪些证件办理牌照申领手续?()该批货物的申报期限为()。
Afterdecadesofdecline,theshareofmotherswhostayhomewiththeirchildrenhas【C1】______risenoverthelastseveralyears,
最新回复
(
0
)