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
2010-06-30
38
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 ail 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 stmctrue 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、The tests of new airliner before its flying.
B、How to protect a new airliner?
C、How to train a new pilot?
D、What the airliner engineers should do?
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/D3Jd777K
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
Agingbabyboomersaredeterminedtofighttheagingprocess.Theyspendmillionsofdollarsayearon【C1】______theyperceiveas
WhatcanbesaidaboutthereportbytheNationalAcademyofSciences?
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
Payandproductivity,itisgenerallyassumed,shouldberelated.Buttherelationshipseemstoweaken【C1】______peoplegetolder
AnswerQuestions71to80byreferringtothepassagesonthefollowingpages.AnswereachquestionbychoosingA,B,orCandm
AnswerQuestions71-80byreferringtothe4shortpassagesA,B,CandD.AnswereachquestionbychoosingA,B,CorDandmar
AnswerQuestions71-80byreferringtothe4shortpassagesA,B,CandD.AnswereachquestionbychoosingA,B,CorDandmar
AccordingtotheAmericanAcademyofDermatology,anestimated10to50millionpeopleinthiscountryhaveanallergicreaction
Accordingtothespeaker,whatareconveniencegoods?
January题目中是setting-up时间,而短文中则以start来表述,尽管用词不同,意思是相同的。所以答案是January。注意此类题目会越来越多。
随机试题
将函数f(x)=展开为(x一1)的幂级数.
男,30岁,突发性中上腹刀割样疼痛3小时,体检:全腹部压痛、反跳痛、肌紧张。行腹部立位摄片发现膈下游离气体。推测该病人的腹膜炎产生的原因是
(2003年司考试题)证券发行中因虚假陈述致使投资者在证券投资中遭受损失的,发行人、承销商应承担赔偿责任,下列哪些人应负连带赔偿责任?()
背景东北某市新建一建筑面积39600m2的文化体育中心工程,地上6层,地下2层,局部埋深9m。工程选址位于某山坡,一半基础须回填,混凝土灌注桩局部桩承台加整体筏板基础,地上钢筋混凝土框架结构。3层会议厅主梁采用预制钢筋混凝土,1000人餐厅采用预
某工程采用工料单价法计价程序计算工程造价,以直接费为计算基数,已知该工程直接工程费为2000万元,措施费为200万元,间接费费率为10%,利润率为5%,综合计税系数为3.41%,则该工程的含税造价为()万元。
下列关于国家预算作用的表述,正确的是()。
2012年年末,按照贷款五级分类的口径,我国某商业银行各类贷款余额及贷款损失准备的情况是:正常贷款1000亿元;关注贷款100亿元;次级贷款20亿元;可疑贷款10亿元;损失贷款10亿元;贷款损失准备100亿元。根据上述资料,回答下列问题:根据
根据《合同法》的规定,下列要约中,不得撤销的有()。
根据所给资料,回答下列问题。某市统计局开展了一次关于市民参加慈善捐助活动的专题调查,成功访问了该市2003位16周岁及以上的常住市民。调查显示,47.5%的市民在过去一年中参加过不同种类的慈善捐助活动。在5类市民提供慈善捐
精神文明是()。
最新回复
(
0
)