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
45
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
A、Investintoamutualfund.B、Usethediscounttickets.C、Quithiseating-outhabit.D、Useonlypaperbillsandsavecoins.A选项
A、Encouragethegrowthofreading.B、Changepeople’sattitudestoreading.C、Showhowreadingmethodshavebeenimproved.D、Expl
A、Heisalcoholic.B、Hehaseyetrouble.C、He’sgotaheadache.D、He’sgotastomachache.A由男士提到的“以前我喝酒一点事都没有,但现在仅仅喝几杯之后,我就开始感觉很
那些看过李安的电影《饮食男女》(EatDrinkManWoman)的人大概不会忘记中国菜吧,菜的外表便足以让人垂涎三尺了。中式菜因为它的美味和吸引人的外表在世界上享有很高的声誉。亦因为气候的多样化,本地产品和习俗的关系,在中国有很多当地特色食品。事实
EachyearUniversum,aSwedishconsultingfirm,asksAmericanMBAstudentswheretheywouldmostliketowork.The2007surveys
TheEnglishmansuspectsalltheories,philosophicalorother.Hesuspectseverythingnewandisreluctanttoacceptitattheve
A、Youcan’tchoosetheplaceyouwanttovisit.B、Youhardlyhaveanychancetoknowthelocalpeople.C、Youhavetostaywiths
A、OutstandingteacherslikeProfessorJohnsonarerare.B、ProfessorJohnsonhaswonamilliondollarsasanaward.C、ProfessorJ
A、Everyonethereplayssoccer.B、Chileansrarelychangetheteam.C、Peopledon’ttalkaboutsoccerthere.D、Chileansonlysuppor
A、Thespeakerswillhavearest.B、Therewillbeayearlyemploymenttest.C、Thedepartmentwillholdaparty.D、Thebosswillh
随机试题
属于生物碱类的抗癌药有()
预防牛皮蝇蛆病,可在皮蝇飞翔季节对牛体喷洒的药物是
甲公司擅自使用温网冠军“王娜”的名字注册了运动服装的商标。此后,甲公司与乙公司约定,甲授权乙在运动品牌上使用“王娜”商标,期限9年,许可费用90万元,分9期支付,每年的1月1日支付10万元。很快,王娜得知此事并欲撤销甲公司的“王娜”注册商标,为此咨询了知识
B公司目前生产一种产品,该产品的适销期预计还有6年,公司计划6年后停产该产品,生产该产品的设备已经使用5年,比较陈旧,运行成本(人工费、维修费和能源消耗等)和残次品率较高,目前市场上出现了一种新设备,其生产能力、生产产品的质量与现有设备相同。新设备虽然购置
营造劳动安全卫生环境,即营造劳动安全卫生的()。
一般认为,()是构成教学过程的基本要素。
设f(x)在=0处连续且求f(0)并讨论f(x)在x=0处是否可导?若可导,请求出f’(0).
在某银行业务的用例模型中,“取款”用例需要等到“存款”用例执行之后才能执行,两个用例之间的关系属于(1);“取款”和“存款”两个用例中都需要执行查询余额的功能,将查询余额提取成独立的用例,那么“取款”和“存款”用例与“查询余额”用例之间的关系属于(2)。
fire
Accidentsarecaused;theydon’tjusthappen.Thereasonmaybeeasytosec:anoverloadedtray,ashell’outofreach,apatch
最新回复
(
0
)