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
2019-05-23
46
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, or"pressured" , the air presses against the skin of the plane inside. The pressure on a small window, for example, is like a huge, giant 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. This does not cause so much damage inside the water tank as it would anywhere else. 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. 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 ever carry passengers.
It can be inferred that during the test, ______.
选项
A、water is pumped into the plane instead of air
B、more air is pumped into the plane than usual
C、water exerts great pressure on the skin of the plane
D、the weaker parts receive greater pressure
答案
B
解析
是把飞机放到水里,而不是把水注到飞机里,故A选项错误。文章中提到“The pressure inside the plane is greater that it ever will be when it is in the air”,由此可推断出往飞机内注入了更多的气体。C选项是事实,无需从文中推断,D选项错误。
转载请注明原文地址:https://www.kaotiyun.com/show/SbDC777K
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
Ifthiskindoffishbecomes_______,futuregenerationsmaynevertasteitatall.
OnOctober31st,dozensofchildrendressedincostumes(节日服装)knockontheirneighbors’doorsandyell"TrickorTreat"whenth
A、Theyusuallydon’tfollowfamilyrules.B、Theydon’tliketotakechancesintheirlives.C、Theyarelesslikelytobesuccess
Itisreportedthatairpollutionaffectsriversandlakesindirectlybecauseitcausesacidrain.
Whydowelaugh?Foryearsscientistshaveaskedthemselvesthisquestion.Noanimalslaughandsmile—onlyhumanbeingsdo.Sod
Thelegallimitfordrivingafterdrinkingis80milligramsofalcoholin100millilitersofbloodintheU.S.whentested.But
Lifeasawomaninthecolonial(殖民的)Americaseemsquitedifferentfromitistoday.Womenwereconsideredinferiortomen,a
Facialexpressionscarrymeaningsthatarepartlydeterminedbyculture.Forexample,manyJapanesedonotshowtheiremotionsa
Facialexpressionscarrymeaningsthatarepartlydeterminedbyculture.Forexample,manyJapanesedonotshowtheiremotionsa
ThedistinctivearchitecturalfeatureofthetypicalBroadwaytheateristhejuxtaposition(毗邻)oftwoalmostindependentbuilding
随机试题
以下情况适合于冷疗法的是
多用户结构是指有多台微机,但每台微机都有相应的输入输出设备,每台微机仍属单机结构,各台微机不发生直接的数据联系(通过磁盘、光盘、U盘、移动硬盘等传送数据)。()
在采用聚焦战略的组织中,人力资源管理的重点是()。
公司办公室有五位职员,针对元旦谁来值班的问题,大家商定的意见,可以概括为以下四条:(1)如果E来值班,那么A、C中来一人。(2)只有E来,D才来。(3)如果B不来,那么A也不来。(4)如果C来,那么B也要来。现在知道
剧作者只有认真________新军事变革时期部队生活的经验,才能在任何时候和任何情况下都能做到________,真正写出被部队官兵认可,深受广大观众喜爱的优秀作品。填入画横线部分最恰当的一项是:
一个班集体的形成要经过哪几个阶段?
甲盒内有红球4只,黑球2只,白球2只;乙盒内有红球5只,黑球3只;丙盒内有黑球2只,白球2只.从这三只盒子的任意一只中任取出一只球,它是红球的概率是().
国家政治生活的主题是
Informationistheprimarycommodityinmoreandmoreindustriestoday.By2005,83%ofAmericanmanagementpersonnelwillb
Withmoreandmoreyoungpeoplegettingintotroublewiththelaw,socialworkersareverybusy.Theyaretryingtokeep【B1】____
最新回复
(
0
)