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
外语
A、To find out how much air can be pumped into a plane. B、To find out how much air passengers need to breathe at certain altitude
A、To find out how much air can be pumped into a plane. B、To find out how much air passengers need to breathe at certain altitude
admin
2015-04-30
51
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、To find out how much air can be pumped into a plane.
B、To find out how much air passengers need to breathe at certain altitudes.
C、To find what would happen if the plane crashed in the water.
D、To find out if there are any weak parts in the plane that would burst under pressure.
答案
D
解析
细节题。文章谈到了减压水舱试验(tank test)是为了帮助工程师发现飞机的裂缝,以防飞机在飞行过程中由于压力过大而爆炸。
转载请注明原文地址:https://kaotiyun.com/show/1Oh7777K
0
大学英语六级
相关试题推荐
A、It’snotnecessarytocollectinformationaboutthecompany.B、Yourunderstandingofthejobrequirementsisveryimportant.C
A、Johnwasdisappointedathismathscore.B、Johndidbetterthanhethoughthewasableto.C、Johndidn’tpass,althoughhehad
A、Askelderlyadultstoattendthem.B、Hireanexperiencedbaby-sitter.C、Keeptheminfamily-baseddaycarecentres.D、Letthem
A、Hehasafeelingofinsecurity.B、Heismissinghisfamily.C、Helacksself-confidence.D、Hefeelsill.B选项中的He,feelingofins
A、Therewasaweaklinkbetweencancerriskanddrinkingdecaffeinatedcoffee.B、Peoplewhodrinklessthan4cupsofcoffeead
A、Moreknowledgeiscoveredinalecture.B、Alessonrequiresstudents’activeinvolvement.C、Studentsusuallytakeanactivepa
EachyearUniversum,aSwedishconsultingfirm,asksAmericanMBAstudentswheretheywouldmostliketowork.The2007surveys
UseoftheillegaldrugnamedEcstasy(MDMA)hasincreasedalarminglyinBritainoverthelastfewyears.Manydeathshavesofar
中国画(traditionalChinesepainting)是用毛笔、墨及颜料(pigment),在宣纸(Xuanpaper)或绢(silk)上画出的画。中国画与中医、京剧一起,被誉为中国的“三大国粹”(threequintessenceof
A、Inclusionofappropriatehumor.B、Directstatementofpurpose.C、Professionallook.D、Accuratedating.A短文中提到,用诙谐的语言书写备忘录是备忘录区
随机试题
某生物制药公司年销售净额280万元,息税前利润80万元,固定成本32万元,变动成本总额168万元,资产总额200万元,负债资本比率为40%,综合债务利率为12%,公司的所得税税率为33%。预计3年后,公司的资产总额达到1000万元,负债率会提高到60
缺乏叶酸的乳品是
急性心肌梗死时,最先恢复正常的酶是
投标人在研究合同条件时,应核准的日期和时间包括()。
丁老师(中国居民)2012年1月取得以下收入:①月工资薪金9000元。②国债到期,取得利息收入3500元。③编写教材一本,取得一次性稿酬8000元。④出租商铺,每月租金6000元。⑤参加某专业学术性报告,取得一次性劳务报酬3000元。要求:根据
根据《中华人民共和国教师法》的规定,对教师的考核内容不包括()。
对下列句中加下划线的字的理解正确的是()。
教育的社会流动功能在当代的重要意义有哪些?
文小雨加入了学校的旅游社团组织,正在参与组织暑期到台湾日月潭的夏令营活动,现在需要制作一份关于日月潭的演示文稿。根据以下要求,并参考“参考图片.docx”文件中的样例效果,完成演示文稿的制作。在第6张幻灯片的右上角,插入考生文件夹下的“图片5.gif”
Mr.MikeSmith:Itwasn’taneasydecision,butwe’vebeenaskingforadecentwageforyears.Nowatlastpeoplearebegin
最新回复
(
0
)