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
A、Two important tests of a new airliner because it is put into use. B、How to carry out tank test in the water. C、How pilots carr
A、Two important tests of a new airliner because it is put into use. B、How to carry out tank test in the water. C、How pilots carr
admin
2015-04-30
51
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.(22)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.(23)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.(24) This doesn’t cause so much damage in side the water tank as it would anywhere else. Engineers can discover which part of the plane cracked. This part is made stronger.
(24)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.(25)These two tests are examples of how planes are made safe before they ever carry passengers.
Questions 22 to 25 are based on the passage you have just heard.
22. What is the purpose of the tank test?
23. Why is the tank test carried under water?
24. Where is the second test carried out?
25. What does this speaker mainly talk about?
选项
A、Two important tests of a new airliner because it is put into use.
B、How to carry out tank test in the water.
C、How pilots carry out the test flights.
D、How to make a safe passenger plane.
答案
A
解析
主旨题。文章主要讲述了飞机在正式使用前进行的两次试验。在短文的最后也总结说这两次实验是测试飞机在载客之前的安全性能。
转载请注明原文地址:https://kaotiyun.com/show/nOh7777K
0
大学英语六级
相关试题推荐
Hewasafunny-lookingmanwithacheerfulface,good-naturedandagreattalker.Hewas【B1】______byhisstudent,thegreatphil
Ifyou’relikemostpeople,you【B1】______fakelisteningmanytimes.Yougotohistoryclass,sitinthethirdrow,andlooksqua
A、Antibiotics.B、Coughmedicine.C、Honeyandwhisky.D、Over-the-countermedicines.C由对话中女士提到的Iusuallyrelyon…honeyandwhisky(
DeclineofColoradoRiverisSevere[A]TheColoradoRiver,whichflowedacrossthelandwithsuchgustothatitcarvedthemajes
Ourbodiesexperienceanebbandflowofenergythroughouttheday.Thisiscalledacircadianrhythm,andithasbeenstudied【C
A、Societyistobeheldresponsible.B、Moderncivilizationisresponsibleforit.C、Thecriminalhimselfshouldbeartheblame.
Childrencanspendhoursadaylookingatcomputerscreensandotherdigitaldevices.Someeyecareprofessionalssayallthats
America’srecenthistoryhasbeenapersistenttilttotheWest—ofpeople,ideas,commerceandevenpoliticalpower.California
A、CreatingAbstractExpressionism.B、Paintingpeopleandanimals.C、Sponsoringanewartmovement.D、Exploringrealisticmethods
随机试题
使用保幼激素合成物杀虫属于()
A.厌氧菌感染B.肺炎球菌肺炎C.支原体肺炎D.金黄色葡萄球菌肺炎E.克雷伯杆菌肺炎患者,男,50岁。发热伴咳嗽、咳痰3天,痰为红色胶胨状,白细胞15×109/L,既往体健。体检:体温38.6℃右上肺叩浊,可闻及支气管呼吸音。胸片示右上肺大片状
A.6-二甲氨基-4,4-二苯基-3-庚酮盐酸盐B.N-苯基-N-[1-(2-苯乙基)-4-哌啶基)丙酰胺枸橼酸盐C.N-甲基-N-环己基-2-氨基-3,5-二溴苯甲胺盐酸盐D.1-正丁酰基-4-肉桂基哌嗪盐酸盐E.1-甲基-4-苯基-4-哌啶甲酸
手术的参观者与手术区应保持()
按级配原则构成的沥青混合料,其结构组成可分为()。
下列所述的法律原则中,属于政策性原则的是:
Lookatyoursmartphone.Thinkaboutthedecisionsyouwillmakeonittoday.Youmaysnatchadinner【C1】______,tellyourspous
在考生文件夹下,打开文档word1.docx,按照要求完成下列操作并以该文件名(word1.docx)保存文档。【文档开始】常用的网罗互联设备常用的网罗互联设备主要有:中继器、网桥、路由器和网关。中继器比较简单,它只对传送后变弱的信号进行放大和转发
PovertyandHealthThelinkbetweenhealthandeconomicoutcomeshasalwaysbeenacentralissueforbotheconomistsandsoc
A、Factorsinfluencingoilprices.B、Therisinglivingcost.C、Theharsheconomicconditions.D、Causesandeffectsofinflation.
最新回复
(
0
)