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、Two important tests of a new airliner because it is put into use. B、How to carry out tank test in the water. C、How pilots carr
A、Two important tests of a new airliner because it is put into use. B、How to carry out tank test in the water. C、How pilots carr
admin
2016-06-19
33
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.(12)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.(13)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.(14)This doesn’t cause so much damage inside the water tank as it would anywhere else. Engineers can discover which part of the plane cracked. This part is made stronger.
(14)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.(15)These two tests are examples of how planes are made safe before they ever carry passengers.
Questions 12 to 15 are based on the passage you have just heard.
12. What is the purpose of the tank test?
13. Why is the tank test carried under water?
14. Where is the second test carried out?
15. What does this speaker mainly talk about?
选项
A、Two important tests of a new airliner because it is put into use.
B、How to carry out tank test in the water.
C、How pilots carry out the test flights.
D、How to make a safe passenger plane.
答案
A
解析
主旨题。文章主要讲述了飞机在正式使用前进行的两次试验。在短文的最后也总结了这两次实验是测试飞机在载客之前的安全性能。
转载请注明原文地址:https://kaotiyun.com/show/u0G7777K
0
大学英语六级
相关试题推荐
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendpeopletocollegestointerviewgraduatingstudentsw
A、Hethinksthewomanshouldn’tspeaksoopenly.B、Hetotallyagreeswiththewoman.C、Hewantstopersuadethewomannottothi
A、Hewassurelyunderhugepressure.B、Thecafewasnotoneofhisgreatestachievements.C、HedidalmostnothingsignificantD、
ItiscommonlybelievedintheUnitedStatesthatschooliswherepeoplegotogetaneducation.Nevertheless,ithasbeensaidthatto
A、Sortthemail.B、Answerthemail.C、Readthemagazines.D、Fileimportantinformation.A作者建议我们一收到邮件便马上进行分类整理。
A、Earlydetectionshouldbeattachedmuchimportanceto.B、It’sunrealistictopreventpeoplefromcancer.C、Moreresourcesshou
A、Lightnessofmovement.B、Elaboratescenery.C、Freeexpression.D、Rigidchoreography.C这是一道细节题。现代舞蹈表演区别于古典芭蕾的特征不止一个方面。考生如果把握住了“
北统计局(BeijingBureauofStatistics)数据显示,在过去的5年中,北京市内常住人口数量增长率稳步下降。重点产业的变迁、首都外非行政(non-administrative)职能的准确定位、生活和通勤成本的上升是造成降低的主要原因。
Internetadvertisingisbooming.Theindustryhasgonefrom$9.6billionin【C1】______in2001to$27billionthisyear,accordin
A、Thetourismindustrymightbeaffected.B、Theenvironmentmightbepolluted.C、Peoplemightprotestagainstthegovernment.D、
随机试题
游戏操作
“先天下之忧而忧,后天下之乐而乐”体现了一种()
囊胚着床一般在受精后的
初产妇,26岁,39+5周妊娠,阵发性下腹坠胀14小时,昨晚一夜仅能间断入眠共1小时,今来诊。检查:骨盆外测量正常,LOT,胎心好,宫缩20秒/8~10分钟,宫口开大1cm,先露S-1,胎膜未破,首选下列哪项处理措施
外国企业在中国境内未设立机构、场所,而有来源于中国境内的利润、利息、租金、特许权使用费和其他所得,应当缴纳所得税的税率是( )。
楼面地价=土地单价÷()。
甲公司月末计算本月车间使用的机器设备等固定资产的折旧费7000元,下列会计分录正确的是()。
结合材料,回答问题:材料12015年10月19日至23日,习近平对英国进行了“超级国事访问”,开启了两国关系通往“黄金时代”的大门。陪同习近平访英的代表团中,包含有150人的企业家代表团。访问期间,双方签署多项协议,总金额约400亿英镑
Humanbeingsareanimals.Webreathe,eatanddigest,andreproducethesamelife【C1】______commontoallanimals.Inabiologi
Mr.Smithlivesinthehouse______isleaking.
最新回复
(
0
)