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
2023-08-23
39
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:https://tihaiku.com/zcyy/2951495.html
相关试题推荐
[originaltext]TUVALU,atinycountryinthePacificOcean,hasaskedforhe
[originaltext]E-booksarebringingaboutaprofoundrevolutioninthewayb
[originaltext]E-booksarebringingaboutaprofoundrevolutioninthewayb
[originaltext]AmericanmagicianDavidBlaineistobesuspendedinaglass
[originaltext]AmericanmagicianDavidBlaineistobesuspendedinaglass
[originaltext]W:Honey,couldyoucomehereforasecond.Weneedtotalk.Myp
[originaltext]W:Honey,couldyoucomehereforasecond.Weneedtotalk.Myp
[originaltext]W:Honey,couldyoucomehereforasecond.Weneedtotalk.Myp
[originaltext]W:Honey,couldyoucomehereforasecond.Weneedtotalk.Myp
[originaltext]W:Wow,youmusthavehad5hamburgersalready.Andthefootball
随机试题
[audioFiles]audio_eusm_j01_036(20099)[/audioFiles]A、Theyshouldwaitpatiently.
中国民族自古以来从不把人看作高于一切,在哲学文艺方面的表现都反映出人在自然界中与万物占着一个比例较为恰当的地位,而非绝对统治万物的主宰。因此我们的苦闷,
传染病能在人与人.动物与动物或者人与动物之间相互传播,具有流行性和_______
假定学生Students和教师Teachers关系模式如下所示: Studen
国家食品药品监督管理局负责对药品的A研究、生产、使用进行行政监督和技术监督 B
其他人员应在()等待,不得进入主控室及设备场区。检修区$;$非设备区
A. B. C. D.
传统中国的日常生活世界总是曲里拐弯,充满细节、血肉,剪不断,理还乱。在是否宜居方
A公司只生产销售B产品,其销售量预测相关资料如下表所示: 要求:
属于机坪供电对象的是( )。A.顺闪灯光系统 B.调光器 C.泊位
最新回复
(
0
)