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、In the air. B、On the airfield. C、Under water. D、At plane manufacturing factory. A细节题。文中介绍了最危险的是第二步在空中进行的飞行测验。
A、In the air. B、On the airfield. C、Under water. D、At plane manufacturing factory. A细节题。文中介绍了最危险的是第二步在空中进行的飞行测验。
admin
2015-04-30
67
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、In the air.
B、On the airfield.
C、Under water.
D、At plane manufacturing factory.
答案
A
解析
细节题。文中介绍了最危险的是第二步在空中进行的飞行测验。
转载请注明原文地址:https://kaotiyun.com/show/9Oh7777K
0
大学英语六级
相关试题推荐
A、Somepeoplemaynotgoonthefieldtrip.B、Thetransportationforthetripisfree.C、Everyoneintheclasshaspaidthefee.
Advertisementsappeareverywhereinmodernsociety.Therearemanywaystoadvertiseandadscomeindifferentforms.Newspapers
A、Hehasafeelingofinsecurity.B、Heismissinghisfamily.C、Helacksself-confidence.D、Hefeelsill.B选项中的He,feelingofins
A、Helosteverythingincludinghiscomputer.B、Hesufferedfromaseriouscaraccident.C、Hewentabroadtojoinhisfamily.D、H
那些看过李安的电影《饮食男女》(EatDrinkManWoman)的人大概不会忘记中国菜吧,菜的外表便足以让人垂涎三尺了。中式菜因为它的美味和吸引人的外表在世界上享有很高的声誉。亦因为气候的多样化,本地产品和习俗的关系,在中国有很多当地特色食品。事实
A、Theydidn’tcare.B、Theyhatedit.C、Theylovedit.D、Theyhavemixedfeelings.A预览选项可知,本题可能考查人们对it的态度或感受。文中提到的Fewhadeversee
A、Youcan’tchoosetheplaceyouwanttovisit.B、Youhardlyhaveanychancetoknowthelocalpeople.C、Youhavetostaywiths
Ourbodiesexperienceanebbandflowofenergythroughouttheday.Thisiscalledacircadianrhythm,andithasbeenstudied【C
Apunctualpersonisinthehabitofdoingeverythingatthepropertimeandisneverlateinkeepinganappointment.Theunpunc
A、Affectionandpoliteness.B、Situationsandintimacy.C、Attitudesandrelationships.D、Emotionsandbehavior.B
随机试题
溶组织内阿米巴杜氏利什曼原虫
A.血浆胰岛素水平测定B.血糖测定C.糖化血红蛋白A1测定D.糖化血浆白蛋白测定可反映糖尿病患者近8~12周内血糖总水平的检查是
虚证泄泻的特点是( )热证泄泻的特点是( )
女性,35岁,因心慌、乏力伴怕热、多汗2个月就诊。身体评估:体温37.5℃。心率100次/分,血压140/90mmHg,消瘦,甲状腺弥漫性、对称性Ⅱ度肿大,质软。随吞咽上下活动,伴有震颤,并可闻及血管杂音。患者服用甲硫氧嘧啶治疗1个月后,出现高热、咽痛
患者,男性,32岁,6天前感冒后出现左下后牙区胀痛,进食、吞咽时加重。昨日起出现局部自发性跳痛,张口受限,低热,头痛。检查可见:左下颌角区颊部稍肿胀,无压痛,张口度两指,左下第三磨牙近中阻生牙龈红肿充血,挤压可见远中盲袋内少量脓液溢出,颊侧前庭沟丰满、充血
简述班主任对学生的指导包括哪些方面?应如何进行指导?
小明上小学时因经常把麻雀、青蛙、蚯蚓等带到教室而被老师批评和惩罚,上初中后他仍然经常把小动物带进教室,班主任发现后没有批评他,还在班里成立了动物兴趣小组。他非常激动,向班主任表示了决心。半年后,小明在班主任的引导下,通过对动物的探索活动,懂得了学好各门功课
____,кромеменяистарика-крестьянина,который,впрочем,скоронаразъезде,всегоодин.
Mostpeoplewhotravellongdistancecomplainofjetlag.Jetlagmakesbusinesstravelerslessproductiveandmoreprone【21】makin
Naturalflavoringsandfragrancesareoftencostlyandlimitedinsupply.Forexample,thevitalingredientinarosefragrance
最新回复
(
0
)