首页
登录
职称英语
[originaltext]Before a new airliner goes into service.every part of it is teste
[originaltext]Before a new airliner goes into service.every part of it is teste
游客
2023-08-30
57
管理
问题
Before a new airliner 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 modem airliner must fly at very high altitudes. Air must be pumped into the plane so that the passengers can breathe. The metal structure of the plane has to be very strong for this reason. When the plane is filled with air, the air presses against the skin of the plane inside. The pressure on a small window, for example, is like a huge foot that is trying to get out. If a small part of the plane were to crack, the plane would explode in the sky.. In order to test the structure of the plane, it is lowered into a huge tank of water. 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 get control of the plane again. These two tests are examples of how planes are made safe before they can ever carry passengers.
选项
A、To find out exactly what happens.
B、To save fuel to fly longer.
C、To find out where the big stone is.
D、To fly even more slowly.
答案
A
解析
细节题。短文提到,在第二个测试中,试飞员在所有的引擎被关掉时必须马上确切地找出发生了什么事。因此,本题选A。
转载请注明原文地址:https://tihaiku.com/zcyy/2969990.html
相关试题推荐
[originaltext]WilmaSubrahadnointentionofbecomingapublicspeaker.Af
[originaltext]Recently,aprofessorofphilosophyintheUnitedStateshas
[originaltext]Recently,aprofessorofphilosophyintheUnitedStateshas
[originaltext]Recently,aprofessorofphilosophyintheUnitedStateshas
[originaltext]M:Well,today’spersonalityguestisSallyGladwin.Sally’sonlysi
[originaltext]M:Well,today’spersonalityguestisSallyGladwin.Sally’sonlysi
[originaltext]M:PleasetakemetotheBeijingHotelquickly,orI’llmissthe
[originaltext]M:PleasetakemetotheBeijingHotelquickly,orI’llmissthe
[originaltext]M:PleasetakemetotheBeijingHotelquickly,orI’llmissthe
[originaltext]M:PleasetakemetotheBeijingHotelquickly,orI’llmissthe
随机试题
[originaltext]M:Ican’tgetthiswindowopen.It’sreallystuck.W:Whydon’t
[originaltext]AlinkwhichexistsbetweenLondonandShanghaiisaMemorandumo
Thefruit______nice,but______terrible.A、looks,tastesB、islooked,tastesC、loo
下列建筑中,自动喷水灭火系统设置场所火灾危险等级属于仓库危险级Ⅱ级的是(
A.10V B.0V C.按指数规律增加
发行人提交首次公开发行股票申请文件后,需要中止审查的情形有()。 Ⅰ.发行人申
质量管理体系认证中,有关认证和认可的理解正确的是( )。 A、认证是由第三方
股份有限公司清算后的剩余财产,应该按照()比例分配。A:清算组的决定B:股东持
某公司按CIF条件出口坯布1000包,货在途中因货舱淡水管道滴漏,致使该批坯布中
受力体一点处的应力状态如图所示,该点的最大主应力σ1为:A.70MPa B.
最新回复
(
0
)