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、Permanent loss of eyesight of pilots. B、Loss of consciousness of passengers. C、Tragic results of air accidents. D、Blackouts of
A、Permanent loss of eyesight of pilots. B、Loss of consciousness of passengers. C、Tragic results of air accidents. D、Blackouts of
admin
2017-01-20
69
问题
(5)While flying high above the Earth’s surface, jet fighter pilots may suffer loss of eyesight for brief periods. Some pilots may even lose consciousness—not being able to recognize what is happening around them. These experiences, commonly called "blackouts" , can lead to tragic results.
Researchers say two different situations can lead to a pilot’s loss of consciousness. One is "G-LOC" or G-force induced Loss of Consciousness, and the other one is hypoxia, which is lack of oxygen to the brain.(6)G-LOC happens when the airplane is making a sharp turn or speeding up very quickly. During these periods, centrifugal force reduces the normal flow of blood to the pilot’s brain. At high speeds, loss of control of the aircraft has proved deadly for many pilots.(7)Hypoxia, or lack of oxygen, can affect anyone at extreme heights. That is why passenger planes are equipped with oxygen masks. Passengers are always told before flying to put on the masks in case of a sudden loss of air pressure.
Questions 5 to 7 are based on the news report you have just heard.
5. What is the news report mainly about?
6. When does "G-LOC" usually happen?
7. Why are passenger planes equipped with oxygen masks?
选项
A、Permanent loss of eyesight of pilots.
B、Loss of consciousness of passengers.
C、Tragic results of air accidents.
D、Blackouts of jet fighter pilots.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/bhi7777K
0
大学英语四级
相关试题推荐
HowtoUseTechnologytoMakeYouSmarterA)Canacalculatormakeyousmarter?TheQAMA(developedbyIlanSamson,an"inventor-i
Globalwarmingmayornotbethegreatenvironmentalcrisisofthe21stcentury,but—regardlessofweatheritisorisn’t—wewo
Housingofficialssaythatlatelytheyarenoticingsomethingdifferent:studentsseemtolackthewill,andskill,toaddresst
Forthispart,youareallowed30minutestowriteashortessayentitledPrivateTutoringfollowingtheoutlinegivenbelow.Yo
Forthispart,youareallowed30minutestowriteashortessayentitledThePurposeofCollegeEducation.Youshouldwriteat
Genetics,thestudyofgenes,isgainingincreasingimportance.Genescan【B1】______manythings,fromwhomwelookliketowhat
A、Peopleshouldhavetakenthingsmoreseriously.B、Peopleshouldavoidbeingkilledunexpectedly.C、Peopleshouldhavemadegre
A、Hisinjurykepthimathome.B、Hedidn’tthinkitnecessary.C、Hewastooweaktoseethedoctor.D、Hefailedtomakeanappoi
Happinessisachoice:youcanchoosetobesadwheneverythingisgoingwellforyouandyoucanchoosetobehappyevenwhenn
A、Herattractiveclothing.B、Herbeautifulfigure.C、Herunusualheight.D、Herfashionablehandbag.B短文说,在市场拥挤的人流中,她显得非常优雅。故B正确。
随机试题
外国人工作类居留证件的有效期最短为()日,最长为五年。
________,是解决“三农”问题的根本途径。
哲学的两个基本派别是()
感冒治疗应遵"其在皮者,汗而发之",呼吸系统疾病采用
按《建筑抗震设计规范》规定,抗震设计使用的地震影响系数曲线下降段起点对应的周期值为下列哪个选项?()[2010年真题]
合同权利和义务终止也称()。
郭沫若对于()相当于()对于《管锥编》
______evidencethatlanguage-acquiringabilitymustbestimulated.
下列对于线性链表的描述中正确的是
Sofaraswecantell,allhumanlanguagesareequallycompleteandperfectasinstrumentsofcommunication:thatis,everylan
最新回复
(
0
)