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
专升本
Before a new airliner goes into service, every part of it is tested again and again. But there are two tests that are more impor
Before a new airliner goes into service, every part of it is tested again and again. But there are two tests that are more impor
admin
2018-07-18
20
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.(71)
When the plane is filled with air, or "pressured" , 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. This is what happened to the first Comets. 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. This part is made stronger.
The most dangerous test happens when the new plane is going through test flight in the air.(72)
The test pilot must find 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 ever carry passengers.
A test flight is dangerous because the test pilot has to______.
选项
A、fly his plane at a very high altitude
B、secure a safe landing in a plane crash
C、find out how to handle a plane when its engines stop working
D、fix the damaged engines during the flight
答案
C
解析
事实细节题。由文章第三段第二句“The test pilot must find exactly what happens when all the engines are shut off at once.”及倒数第二句“It is the pilot’s job to find out how he can get control of the plane again.”可知,答案应选C。
转载请注明原文地址:https://jikaoti.com/ti/2GBGFFFM
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Peopleandthesourcesofairpollutionarefoundinthesameplaces.Thismeansthatcitieswithlargepopulationshavethebig
Seldom______anymistakesinthepast15years’workinginthephysicslaboratory.
Morehavebeenlearnedsince1945aboutchemicalchangesinthebodythaninallhumanhistorybefore______time.
OneBritishschoolisfindingthatallowingchildrentolistentomusicoreventohavetheTVonwhilestudyingishelpingimpr
Lifeisfilledwithchallenges.Aswegetolderwecometorealizethatthosechallengesaretheverythingsthatshapeusandm
Thewholecommitteeatonce_______withthechairman’ssuggestion.
WhenIwasstudyingEnglishatatrainingcenterinWashingtonD.C.in1998,IsharedahousewithtwoyoungAmericans,JimandS
A.Theresultofthisprogressisanenormouspopulationincreasethatthreatensthequalityoflife,broughtaboutbyprogress
该是我们采取措施去制止交通事故的时候了。
随机试题
静脉内注射肾上腺素或去甲肾上腺素对心血管的效应是()
下列各种心脏病中红细胞绝对增多的是
确定还原率宜采用()加上风险调整值的办法。
建筑物的基础,按构造方式可分为()。
主副井贯通前,矿井的通风方式是利用()进行通风。
目标市场的模式中,()模式可以分散风险,有利于企业发挥生产、技术潜能,而且可以树立产品品牌的形象,但会受潜在的替代品和新产品的威胁。
关于长期绩效奖励计划的说法,错误的是()。
在知识的提取阶段,个体应用所学知识来解决实际问题,使所学知识产生广泛迁移。()
Atpresenttime,peoplehaveatrendtoliveinthe_________.
NarratorListentopartofatalkinanenvironmentalscienceclass.Nowgetreadytoanswerthequestions.Youmayuse
最新回复
(
0
)