首页
登录
职称英语
[originaltext] Before a new airliner goes into service, every part of it is
[originaltext] Before a new airliner goes into service, every part of it is
游客
2024-04-12
22
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. One of them is very strange and the other is very dangerous.
The first of these is called the "tank test". A modern 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. The pressure on a small window, for example, is like a huge, giant foot that is trying to get out.(12)If a small part of the plane were to crack, the plane would explode in the sky. This is what happened to the first Comets.(13)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.(14)This doesn’t cause so much damage inside the water tank as it would anywhere else. Engineers can discover which part of the plane cracked. This part is made stronger.
(14)The most dangerous test happens when the new plane goes through test flights in the air. The test pilot must find out exactly what happens when the engines are shut off suddenly. He takes the plane up very high. Then he shut 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.(15)These two tests are examples of how planes are made safe before they ever carry passengers.
Questions 12 to 15 are based on the passage you have just heard.
12. What is the purpose of the tank test?
13. Why is the tank test carried under water?
14. Where is the second test carried out?
15. What does this speaker mainly talk about?
选项
A、To find out how much air can be pumped into a plane.
B、To find out how much air passengers need to breathe at certain altitudes.
C、To find what would happen if the plane crashed in the water.
D、To find out if there are any weak parts in the plane that would burst under pressure.
答案
D
解析
细节题。文章谈到了减压水舱试验(tank test)是为了帮助工程师发现飞机的裂缝,以防飞机在飞行过程中由于压力过大而爆炸。
转载请注明原文地址:https://tihaiku.com/zcyy/3552636.html
相关试题推荐
[originaltext]TelephonebooksintheUnitedStateshavewhite,blueandyel
[originaltext]TelephonebooksintheUnitedStateshavewhite,blueandyel
[originaltext]TelephonebooksintheUnitedStateshavewhite,blueandyel
[originaltext]ThenumberofspeakersofEnglishinShakespeare’stimeises
[originaltext]ThenumberofspeakersofEnglishinShakespeare’stimeises
[originaltext]RobertFrostwasborninSanFranciscoin1875andwassenta
[originaltext]RobertFrostwasborninSanFranciscoin1875andwassenta
[originaltext]M:Excuseme.MayIhavesomeinformationaboutthereceptionpar
[originaltext]M:Excuseme.MayIhavesomeinformationaboutthereceptionpar
[originaltext]M:Hi,Mandy.How’severythinggoing?W:Nottoogood,Isuppose.
随机试题
Duringrecentyearswehaveheardmuchabout"race":howthisracedoescert
Peopletendtostrugglewhenlearninganotherlanguage,especiallyiftheya
[originaltext]W:(12)Nowyou’veseenthistableoffiguresaboutthepocketmo
影响尘肺病的发病因素包括()。A.矿尘的成分、矿尘粒度、矿尘浓度、粉尘存在时间
根据《普通高等学校学生管理规定》,学生入学后,学校应当在_______内按照国家
下列属于证券交易所的特征的有()。 ①有固定的交易场所和交易时间 ②交易的
下列各项审计证据中,属于亲历证据的是( )。[2010年初级真题]A.审计人员
控制性详细规划修改涉及城市总体规划、镇总体规划的强制性内容的,应当先修改( )
教学过程是一种特殊的()过程。 A.练习训练 B.情感体验 C.认识 D
一般资料:女,35岁,离异,公司销售主管。 求助问题:婚恋情感问题,四个月。
最新回复
(
0
)