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
41
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
有下列情形()之一的,有期徒刑的期限可以为20年。
Policeman:OK,buddy,yourdrivinglicense.Howfastwereyougoing?William:Wellitwasabout50mphorless.Iwasdrivingve
Inearly2004eighttinysensorsweredroppedfromaplanenearamilitarybaseinCalifornia.Afterhittingtheground,these
______hissister,Jackisquietanddoesnoteasilymakefriendswithothers.
Attheresortstouristsmaydothefollowingexcept______.AccordingtoadBeveningdinnerisavailable______.
Inordertobechosen,applicantsmustsendin______beforeNov.30,2006.Itcanbeinferredthatthecriterion/criteriafor
Theabovelistingismostprobably______.WhichofthefollowingairlinesprovidesthelowestpricetoHongKong?
Mary:Tom,wouldyouliketogotoapartythisSaturday?Tom:______.Whatkindofparty?Mary:It’sabirthdayparty.
Thebillis______atanytimeuptonextFriday.
Obviouslyshewas__________bytheshopownerwhenshewasshoppinginthatstore.
随机试题
1)______theOralApproach2)______theAudiolingualApproach3)______theCognitiveApproach4)______theNa
切除的子宫标本行病理检查,光镜下见子宫壁深肌层内有大量异型的滋养层细胞浸润,并有绒毛结构,应诊断为
关于外展型外科颈骨折的叙述错误的是:
女性,40岁,便秘10余年,加重半年,排便需要刺激性泻药,且伴左下腹腹胀,排出粪便后可缓解,进食量较前减少,体重有所下降,结肠镜未见异常,考虑肠易激综合征,但还需除外
某银行被盗,侦查机关将沈某确定为犯罪嫌疑人。在进行警犬辨认时,一“功勋警犬”在发案银行四处闻了闻后,猛地扑向沈某。随后,侦查人员又对沈某进行心理测试,测试结论显示,只要犯罪嫌疑人说没偷,测谎仪就显示其撒谎。关于可否作为认定案件事实的根据,下列哪一选项是正确
由DK触发器组成的应用电路如图所示,设触发器的初值为0,经分析可知这是一个:
某国有资金投资办公楼建设项目,业主委托某具有相应招标代理和造价咨询资质的招标代理机构编制该项目的招标控制价,并采用公开招标方式进行项目施工招标。招标投标过程中发生以下事件。事件1:招标代理人确定的自招标文件出售之日起至停止出售之日止的时
11338×25593的值为()。
Theenergycrisis,whichisbeingfeltaroundtheworld,hasdramatizedhowthecarelessuseoftheearth’sresourceshasbrough
StudentsofUnitedStateshistory,seekingtoidentifythecircumstancesthatencouragedtheemergenceoffeministmovements,ha
最新回复
(
0
)