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
65
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 can fly to the moon because__________
选项
A、it looks like a balloon.
B、it is much lighter than an airplane.
C、it doesn’t have wings.
D、it works like an untied balloon.
答案
D
解析
细节题。文章第六段都在综述气球的飞行原理,来解释火箭的工作原理,因此选D。
转载请注明原文地址:https://kaotiyun.com/show/1Cii777K
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
主刑
What’sthepurposeoftheconference?HowmanyChinesestudentsareinvolvedintheconference?
Allflights______becauseofthesnowstorm,manypassengerscoulddonothingbuttakethetrain.
Americannolongerexpectpublicfigures,whetherinspeechorinwriting,tocommandtheEnglishlanguagewithskillandgift.
Emma:We’reoutofcreamandsugartoday.Roy:______
Colorisveryimportanttomostanimalsforithelpsthemtogetalongintheworld.Color【B1】tomakeananimaldifficultforit
Forcenturies,explorershaveriskedtheirlivesventuringintotheunknownforreasonsthatweretovaryingdegreeseconomican
Thebillis______atanytimeuptonextFriday.
A:CouldyougetmeExtension6459.please?B:__________.
随机试题
某企业到了2月底,发现甲产品一季度计划才完成50%,便采取日夜轮班生产来平衡实际与计划之间的偏差;发现乙新产品供大于求,价格下降,这时决定立即减少或停止这种新产品的生产,以上措施分别属于()
李红与姚小兰均生于1976年6月7日,1991年7月李红初中毕业后即参加工作,月收入200元,姚小兰继续上高中。1993年9月李红与姚小兰谈到想购一台高级收录机,第二天,姚小兰即拿出姨夫送与她的高级收录机,问李红是否想买,李红看后很喜欢,愿以1400元购下
对于政府委托的评估项目,尤其要重视经济评估,在微观的项目层次上,要从()的角度,按照微观经济学有关原理结合项目所在地区状况进行经济评价。
某工程从英国购进一批水泥,经见证取样后送检复试,主要检测水泥的()等是否满足规范规定。
关于核验施工许可证的说法,正确的是()。
下列利用信息网络诽谤他人的行为属于情节严重的是()。
“教育能够干什么”是指()。
故障管理的步骤包括发现故障、判断故障症状、隔离故障、______故障、记录故障的检修过程及结果。
Whenthesentence"Wearepayingcloseattentiontoyoungconsumers."isturnedintopassivevoice,whichofthefollowingisCO
HowtoMakeAttractiveandEffectivePowerPointPresentationsA)MicrosoftPowerPointhasdramaticallychangedthewayinwhicha
最新回复
(
0
)