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
2024-04-20
17
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. 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、Because the water pressure is greater than air pressure.
B、Because the first Comets crashed in the water.
C、Because there is less damage when the explosion takes place under water.
D、Because it is the only way available for engineers to find out which part has cracked.
答案
C
解析
细节题。文中提到在水下进行水舱试验危险性更小。文中的doesn’t cause so much damage和C选项中的less damage同义。
转载请注明原文地址:https://tihaiku.com/zcyy/3563334.html
相关试题推荐
[originaltext]"CharlieGriffin’sBritishpigwasinmypotatoesagain!"bel
[originaltext]IntheUnitedStatestoday,therearetwomajorparties—theD
[originaltext]Theworldhasbecomenoisierplace,sayexpertsattheLibrar
[originaltext]W:Whatonearthhashappenedtoyou?Youlookabsolutelywornou
[originaltext]W:Whatonearthhashappenedtoyou?Youlookabsolutelywornou
[originaltext]W:Whatonearthhashappenedtoyou?Youlookabsolutelywornou
[originaltext]W:Hi,John.Howarethingsgoing?M:Oh,hi.Fine.Howaboutyo
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
[originaltext]W:Willyoutakethesebookstothelibraryduringyourlunchhou
随机试题
A)Whatmakesabusinessideagood?Haveyoueverthoughtyouhadagreatid
[audioFiles]2015m8x/audio_ezfj_ezflisteningd_20157_009[/audioFiles]
[originaltext]W:Goodevening,andwelcometothisweek’sbusinessworld.Thep
与出版物发行的间接渠道相比,直接渠道( )。A.在一定条件下发行成本有所增加
儿童癫癎中常伴有明显智力低下的是A.良性癫癎伴中央颞区棘波 B.失神发作 C
商品的价值量与( )成正比。A、生产商品的原材料数量 B、商品的使用价值 C
在我国,引起急性胰腺炎的最常见病因是A.胆道疾病 B.手术与创伤 C.内分泌
A.楝科干燥成熟种子B.楝科干燥成熟果实C.山茱萸科成熟果肉D.山茱萸科成熟种子
下列政策措施,能解决市场失灵问题的有()。A.制定反垄断法,实行价格管制,以及
胸部X线片示心影呈“梨形”提示( )。A.主动脉瓣关闭不全 B.主动脉瓣狭窄
最新回复
(
0
)