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、When the airplane slows down very quickly. B、When the airplane is making a sharp turn. C、When the pilots have a heart attack.
A、When the airplane slows down very quickly. B、When the airplane is making a sharp turn. C、When the pilots have a heart attack.
admin
2019-04-27
24
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 speed, 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.
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、When the airplane slows down very quickly.
B、When the airplane is making a sharp turn.
C、When the pilots have a heart attack.
D、When the pilots lose consciousness.
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/itZ7777K
0
大学英语四级
相关试题推荐
A、Itisundergoingadrasticreform.B、Ithasmuchroomforimprovement.C、Itlaysemphasisoncreativethinking.D、Itprioritiz
A、Theycouldbreakpeople’slegs.B、Theycouldsometimesterrifyadults.C、Theycouldflyagainstastrongwind.D、Theycouldkn
Acidrain,whichisaformofairpollution,currentlybecomesasubjectofgreatdebatebecauseofwidespreadenvironmentaldam
Itwasoncethoughtthatairpollutionaffectedonlytheareaimmediatelyaroundlargecitieswithfactoriesandheavyautomobil
A、Ithelpspeopletojudgethemselvesandtheirbehaviorsinasamewaythattheyjudgeothers.B、Itenablespeopletoviewthem
《本草纲目》(TheCompendiumofMateriaMedica)是明代(theMingDynasty)著名的医学家李时珍所著。这部著作近乎200万字,记载药物(medicalsubstance)1892种。除了中草药(Chinese
A、Findajobfortheman.B、Splittherent.C、HelpDavefixupthehouse.D、Lookforanotherplace.D对话结尾处,女士对该房子已毫无合租兴趣:“我想我已经看
A、Higherthanonewholivesindullsurroundings.B、Lowerthanonewholivesinaboringenvironment.C、Thesameasonewholive
Directions:Forthispart,youareallowed30minutestowriteacompositiononExcessivePackaging.Youshouldwriteatleast120
Collagen(胶原蛋白)supplementsA)Anysoupmakerworththeirsaltknowsthatagood,full-bodiedstockissemisolidandunstable
随机试题
Nobodyhastaughthimhowtoactwellonthestage.
Whenpeoplearestruckbylightening,theyfalltothegroundasthoughtheywerestruckbyasevereblowtothehead.Afterthe
建设项目竣工环境保护验收是指建设项目竣工后,环境保护行政主管部门根据《建设项目竣工环境保护验收管理办法》规定,依据环境保护验收监测或调查结果,并通过()等手段,考核该建设项目是否达到环境保护要求的活动。
跟单员在处理样品时应注意的事项是()
某公司债券面值100元,票面利率为8%,每年付息,到期期限10年。如果将债券的利息单独作为证券出手,并且投资者要求的收益率为9%,那么该“利息证券”的发行价格为______。
张女士为A市甲超市财务管理人员,她从2014年1月份开始建立家庭消费电子账,6月份从甲超市购买了下列商品:(1)粉底液一盒,支出400元。(2)白酒1000克,支出640元。(3)食品支出1010元,其中:橄榄油2500克,支出400元;
马克思主义政治经济学的研究对象是社会生产力及其发展规律。
Myfive-year-olddaughterknewexactlywhatshewantedforChristmasof1977,andtoldmeso.Yes,shestillwouldlikethepink
Wheredoyoureallycomefrom?Andhowdidyouget(1)whereyoulivetoday?DNAstudiessuggestthatallhumanstoday(2)from
A、Callforadoctor.B、Buysomemedicine.C、LookforJack.D、SendJacktoschool.A根据对话中男士所说“Sure,I’lldoitrightaway.”可知男士马上要
最新回复
(
0
)