首页
登录
职称英语
[originaltext] (5)While flying high above the Earth’s surface, jet fighter p
[originaltext] (5)While flying high above the Earth’s surface, jet fighter p
游客
2024-01-24
66
管理
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、It is required by the laws and the government.
B、The air pressure is rather low above the Earth’s surface.
C、The passengers will lose consciousness in the planes.
D、Lack of oxygen can affect anyone at extreme heights.
答案
D
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3390045.html
相关试题推荐
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolato
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolato
[originaltext](22)Sportshaveunwrittenrules,sodoesbusiness—andviolato
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpic
[originaltext]IhadspentmylastdayinLondonvisitingfriends,takingpic
[originaltext]Passionfruitistheediblefruitofthepassionflower.(16)Sp
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]M:EnglishLanguageCenter.HowmayIhelpyou?W:Yes.I’mcalli
[originaltext]W:Heytaxi!M:Whereto?W:Well,I’mgoingtotheNationalMuse
随机试题
Formilesaround,theneighborhoodswereemptyandsilent.Storesweredark,
YoungpeopleintheUnitedStatesarefallingbehindtheiroverseaspeersin
[originaltext]M:Hey,nicetoseeyouagainafterthelongvacation.Howareyo
参与免疫应答的细胞表面都具有A.膜表面免疫球蛋白 B.补体受体 C.抗原识别
某单位从银行借入一年期的借款,银行采用贴现法收取利息,其名义利率是每年15%,并
无牙颌牙槽嵴严重吸收的患者排牙时宜工牙宜采用A.解剖式牙 B.半解剖式牙 C
如图所示的四种用具在正常使用的过程中,属于省力杠杆的是:()A. B.
简述市场经济的基本特征。
水利工程生产安全重大事故隐患判定方法分为()。A.事故树法 B.直接判定
A.深吸气末S分裂,尤见于青少年 B.主动脉瓣关闭迟于肺动脉瓣关闭 C.肺动
最新回复
(
0
)