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、Because the water pressure is greater than air pressure. B、Because the first Comets crashed in the water. C、Because there is l
A、Because the water pressure is greater than air pressure. B、Because the first Comets crashed in the water. C、Because there is l
admin
2016-06-19
44
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、Because the water pressure is greater than air pressure.
B、Because the first Comets crashed in the water.
C、Because there is less damage when the explosion takes place under water.
D、Because it is the only way available for engineers to find out which part has cracked.
答案
C
解析
细节题。文中提到在水下进行水舱试验危险性更小。文中的doesn’t cause so much damage和C选项中的less damage同义。
转载请注明原文地址:https://kaotiyun.com/show/g0G7777K
0
大学英语六级
相关试题推荐
A、Membershipinafoodco-op.B、Thebenefitsofhealthfood.C、Shoppinginthesupermarket.D、Thecurrentcostoffood.A对话开门见山地
A、Arrogant.B、Weird.C、Genuine.D、Outgoing.B根据男士的描述,那个男子总是盯着他,当他转身的时候,那个人已经悄然无声地站在了他身旁,可以推断出那个人行为古怪。故答案是B。选项是四个形容词,猜测题目与某人的性格有关
DoctorsinBritainarewarningofanobesity(肥胖症)timebomb,whenchildrenwhoarealreadyoverweightgrowup.So,whatshould
A、Itwasnotreallyamagazine.B、Itfeaturedavarietyofarticlesandstories.C、Itwaspraisedbyreadersofpoetry.D、Itwas
Thewaypeopleholdtothebeliefthatafun-filled,painfreelifeequalshappinessactuallyreducestheirchancesofever【B1】
A、Peoplewhoareinthehabitofswitchingfromonebanktoanother.B、Youngpeoplewhoarefondofmoderntechnology.C、Youngp
A、Someonespilledwateronit.B、Someonelostit.C、Itwasmadeoflowqualitymetal.D、Thestandardformeasuringhadchanged.
A、Hedidn’texpecttobuyalot.B、Hehadonlyonebagofgroceries.C、Thesupermarketisjustdowntheblock.D、Hethoughthe’d
中国经济已经出现了明显的结构改善的迹象。一方面,贸易顺差(tradesurplus)出现了明显的而且是持续的下降,其主要原因不是出口的放缓,相反是进口的加速;另一方面,居民消费占GDP的比重不是像统计所说的持续下降,而是从2007年开始就持续上升。这些结
自中国实行社会主义市场经济以来,中国人的生活水平快速提高,中国人的传统观念和价值观随之发生了巨大的变化。人们已开始接受许多现代观念,如私有企业的观念,私有和利润的观念,自由民主、自力更生、机遇均等、平等竞争、物质财富、勤奋劳作的观念,经济全球化的观念。在日
随机试题
在公园绿化中,我国南方_______占有率比北方的要高。
与糖皮质激素治疗感染中毒性休克的机理无关的因素是:
具有广谱、高效的杀菌作用,对金属腐蚀性小,受有机物影响小的化学消毒剂是
甲状旁腺腺瘤手术成功后,常出现的电解质紊乱是
应收账款系统的制单方式指计算机根据原始单据如何编制记账凭证,一般有()。
根据资本资产定价模型在资源配置方面的应用,下列正确的有()。Ⅰ.牛市到来时,应选择那些低β系数的证券或组合Ⅱ.牛市到来时,应选择那些高β系数的证券或组合Ⅲ.熊市到来之际,应选择那些低β系数的证券或组合Ⅳ.熊市到来之际,应选择那些
当经济出现停滞同时又存在通货膨胀即滞胀时,国家应采取的政策组合为()。
20世纪五六十年代,全球化进入了新的发展阶段,但有人却称此时的全球化为半球化,其原因在于()。
开展科学发展观的实践活动,要努力在改进作风上取得新的成效。要坚持()。
成语中的数字运用很多,如一鼓作气、百废俱兴。非整数也进入了成语,如半途而废、半壁江山。还有两个成语:一举两得、一箭双雕。“两”和“双”是数字“2”的不同表示法。多数成语都是由四个文字组成的,数目字有时还被“连用”,如五光十色、三头六臂。也有成语纯粹由数目字
最新回复
(
0
)