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
2024-04-23
81
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 modern airliner must fly at very high altitudes.[23]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 a-gainst 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.
23. Why must air be pumped into the plane?
24. What will possibly cause the plane to crash?
25. For what purpose does the pilot shut off all the engines?
选项
A、The plane can’t fly without air.
B、The plane needs air for its refueling.
C、It meets the passengers’ needs.
D、It meets the pilots’ needs.
答案
C
解析
短文提到,空气必须被灌入飞机里,这样乘客才能呼吸,即为了满足乘客的需要,故选C。
转载请注明原文地址:http://tihaiku.com/zcyy/3567759.html
相关试题推荐
[originaltext]Beforeanewairlinergoesintoservice,everypartofitis
[originaltext]Beforeanewairlinergoesintoservice,everypartofitis
[originaltext]Foryearsscientistshavebeenworriedabouttheeffectsofa
[originaltext]MySpace,thesocialnetworkingwebsite,isdifferentfromoth
[originaltext]W:Hey,Sam!YoushouldtakealookatthisarticleaboutCanadia
[originaltext]W:Hey,Sam!YoushouldtakealookatthisarticleaboutCanadia
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hello,Prof.Webs
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hello,Prof.Webs
[originaltext]M:MathDepartment,DoctorWebsterspeaking.W:Hello,Prof.Webs
[originaltext]W:HowwasyourdinneratthenewItalianrestauranttoday?M:We
随机试题
TheInternetprovidesanamazingforumforthefreeexchangeofideas.Give
WhataidwillBritainincrease?[originaltext]TheBritishChancellorofthe
肠结核的好发部位是()。A.空肠 B.回盲部 C.升结肠 D.乙状结肠
第一个讲宇宙发生论的新儒家哲学家是()。A.邵雍 B.周敦颐 C.张载
患儿,11个月。晨起打喷嚏,午后体温升至39.5℃,并阵发强直性阵挛抽搐,双眼上
关于胃癌扩散转移途径,哪项是不正确的A.可转移到左侧锁骨上淋巴结 B.可转
下列选项中不属于拉巴波特认为的决定目标企业价值的因素是()。A:销售利润 B:
晓东在记忆英文单词时,如果不对其加以复述,这个单词在他头脑中只能保持几十秒。这种
某财务人员咨询按现行企业所得税政策规定,企业发生的各种保险支出能否税前扣除及税前
A公司为增值税一般纳税人,其为生产甲产品于2×20年1月1日自一般纳税人B公司处
最新回复
(
0
)