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
45
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
A、Itissomethinginevitable.B、Itisfrustratingsometimes.C、Ittakespatiencetomanage.D、Itcanbeagoodthing.D
Youngpeoplenowlivealife-style______theirparentscouldhardlydreamof.
Socialsupportconsistsoftheexchangeofresourcesamongpeoplebasedontheirinterpersonalties.
Butformany,thefactthatpoorpeopleareabletosupportthemselvesalmostaswellwithoutgovernmentaidastheydidwithit
People’sattitudes【C1】______gift-givingmay【C2】______fromcountrytocountry,【C3】______thedesiretoconveyafeelingoffriend
______,wewillreviewallthelessonsbeforethefinalexam.
Itisnaturalforyoungpeopletobecriticaloftheirparentsattimesandtoblamethemformostofthemisunderstandingsbetw
Massproductionhasmade______thegoodsandserviceswewantatalowerprice.
Itisaterribleillustrationofman’sweaknesstonature,andthetsunami(海啸)thatstrucktheJapanesecoastinMarch,2011has
随机试题
有一种模型有如下特征:①允许有一个以上的结点无双亲;②至少有一个结点有多个双亲。则该模型为________。
当阻滞麻醉镇痛效果不全时,常加用下列哪种方法可取得较好的效果
成书于西汉时期成书于宋代
A.安置在危重病房B.安置在普通病房C.安置在隔离病房D.安置在心电监护室E.安置在处置室急性心肌梗死病人入院时应()。
在工程量清单的应用程序中,施工阶段承发包双方的主要工作包括()。
措施项目清单中的()应按照国家或省级、行业建设主管部门的规定计价,不得作为竞争性费用。
下列行为中,没有违反《中华人民共和国妇女权益保障法》的是()。
Oneofthemostinterestingofallstudiesisthestudyofwordsandwordorigins.Eachlanguageis【C1】______ofseveralearlier
A、Pink.B、Black.C、Red.D、White.C本题的问题关键词是whatcolor。对话中提到女孩的旧手机是粉色,黑白色为流行色,而这个新的是少见的红色,因此选C。
A、Becausetheywanttotraveltobroadentheirhorizon.B、Becausetheywanttoexplorewhattheyareinterestedin.C、Becauseth
最新回复
(
0
)