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
外语
What’s the main topic of this passage?
What’s the main topic of this passage?
admin
2010-07-06
52
问题
What’s the main topic of this passage?
Before a new plane goes into service, every part of it is tested again and again. But there are two tests that are more important than all the others. In the first test, a modern airliner must fly at very high altitudes. Air must be pushed into the airliner so that the passengers can breathe. The metal structure of the plane has to be very strong for this reason. When the airliner is filled with air, the air presses against the skin of the plane inside. The pressure on a small window, for instance, is like a huge, giant foot that is trying to get out. If a small part of the plane were to crack, the plane would explode in the sky. It is lowered into a huge tank of water to test the structrue of the plane. Then it is filled with air. The pressure inside the plane is greater than it ever will be when it is in the air. Finally, there is an explosion. Engineers can discover which part of the plane has cracked.
In the second test, the test pilot must find out exactly what happens when all the engines are shut off at once. He takes the plane up very high. Then he shuts the engines off, the plane begins to fall like a stone. It is the pilot’s job to find out how he can control the plane again. These two tests are examples of. how planes are made safe before they ever carry passengers.
选项
A、To find out exactly what happens.
B、To save fuel.
C、To fly more slowly.
D、To keep balance.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/j8Dd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Accordingtothewoman,whatgovernstheclotheswewear?
Whatisthispassagemainlyabout?
Youhavereadanarticleinamagazinewhichstates,"Currentlyitishardforuniversitygraduatestofindjobs.Therefore,the
InFrance,allschoolsfollowthesamebasiccurriculum.Therearequiteafewafter-schoolprogramsafter4:30pm.
WhichofthefollowingistrueaboutfathersinSweden?WhatisonefeatureoftheparentalleaveinSweden?
Whichisthebesttitleforthepassage?Itcanbeinferredthat
Thefirstparagraphismainlyabout______.Populationpolicywetakeshouldbeconsidered______.
1/One与上面两题一样,本题答案在第三个话轮中男士第三句话的最后部分:...oneadditionalreport。这种信息和答案集中在一句话的情况在实考中较为少见,但对考生听音辨音、瞬间记忆的能力要求相当高,可以很好地锻炼考生的听力理解能力。
Thursday
随机试题
新凌传媒公司准备申请“新凌”商标,公司法定代表人指定本公司商标专员李万喜办理。申请商标注册时,应提交的申请文件不包括()。
治疗“喑痱”的方剂是
疏水性润滑剂用量过大片剂的硬度不够
关于混凝土贯入阻力试验,下列说法正确的是()。
X省Y事业单位该年年初准备使用财政性资金修缮和装修一幢办公楼,预算金额为800万元,采用公开招标方式,经确认,此次采购项目已经达到公开招标的标准。该单位委托甲招标公司代理进行公开招标的事宜,已知甲公司取得的政府采购代理机构资格的中介机构。甲公司于3月1日在
滞期费
根据《中华人民共和国教育法》,设立学校及其他教育机构,必须具备的基本条件有()。①有组织机构和章程②有合格的教师③有稳定的生源④有符合规定标准的教学场所及设施、设备等⑤有必备的办学资金和稳定的经费来
Sportingactivitiesareessentiallymodifiedformsofhuntingbehavior.Viewedbiologically,themodernfootballerisrevealeda
Anxietydisordersarecommonandrangefrom10percentto20percentofchildrenandteens.Girlareusuallymorelikelythanbo
Whatisthesignificanceofthenewlydiscoveredfossils?
最新回复
(
0
)