首页
登录
职称英语
[originaltext] Not long ago it was assumed that the dangers man would meet in
[originaltext] Not long ago it was assumed that the dangers man would meet in
游客
2023-09-15
76
管理
问题
Not long ago it was assumed that the dangers man would meet in space would be terrible, the main ones being radiation and the danger of being hit by meteors. It is perhaps worth remembering ’that less than two centuries ago the dangers of train travel seemed similarly terrible. A man would certainly die, it was thought, if carried along at a speed of thirty kilometers per hour.
There are two sorts of radiation man must fear in space. The first is radiation from the sun, and this is particularly dangerous when the sun is very active and explosions are occurring on its surface. The second, less harmful form comes from the so-caned Van Allen Belts. There are two areas of radiation about 1 500 miles away from the earth. Neither of these forms of radiation area danger to us on the earth, since we are protected by our atmosphere. Specifically, it is that part of our atmosphere known as the ozonosphere which protects us. This is a belt of the chemical ozone between 12 and 21 miles from the ground, which absorbs all the radiation.
Once outside the atmosphere, however, man is no longer protected, and radiation can be harmful in a number of ways. A distinction must be drawn between the short-and long-term effects of radiation. The former are merely unpleasant, but just because an astronaut returning from a journey in space does not seem to have been greatly harmed, we cannot assume that he is safe. The long-term effects can be extremely serious, even leading to death.
选项
A、Any astronaut returns from the universe is safe.
B、Any astronaut returns from the universe suffers a lot.
C、We can assume that an astronaut is safe from his bad looks.
D、We cannot assume that an astronaut is safe from his good looks.
答案
D
解析
What can we infer from the passage?
四个选项都是关于宇航员从太空返航的,由此可以推测,本问题的考查内容可能与宇航员有关。
文中关键句为...an astronaut returning from a journey in space does not seem to have been greatly harmed, we cannot assume that he is safe. 即使宇航员看起来状态并不像受过严重损伤,也不能认为他是很安全的。故正确答案为D)。
转载请注明原文地址:http://tihaiku.com/zcyy/3017193.html
相关试题推荐
[originaltext]W:Hello,mayIhelpyou?M:Yes,I’dliketobookaroom
[originaltext]W:Morning,sir.MayIaskwhetherMr.Smithhasfreetimeno
[originaltext]W:Haveyoureceivedthemoneyfromtheinsurancecompanyto
[originaltext]M:IneedaticketforRight220onDecember22.W:OK,
[originaltext]M:Howmucharethesebooks?W:345yuan.Howwouldyou
[originaltext]M:Whyareyousodressedup,Merry?W:Oh,hi,Tom.Ih
[originaltext]M:Whyareyousodressedup,Merry?W:Oh,hi,Tom.Ih
[originaltext]W:Tom,shouldIaskthebossforpromotion?M:Absolutel
[originaltext]M:Ihavetogetupearlytomorrow.So,pleasegivemeawake
[originaltext]W:Howdidyougettoknowaboutthisopening?M:Oneof
随机试题
[originaltext]W:Themuseumexhibitthatourprofessorrecommendedjustclosed.
ThemusicalScrambledFeir(i)______the(ii)______ofthetheatricalworld,poki
[originaltext]M:Whatwouldyouliketodrink,Mrs.Brown?Beer.wineorchampa
[originaltext]Silenceisunnaturaltoman.Hebeginslifewithacryanden
公共关系调查的指导原则指()A.全面性原则 B.代表性原则 C.客观性原则
与细胞分裂生长以及蛋白质合成密切相关的矿物质是()。A.钾 B.镁
判断脊柱骨折脱位是否并发脊髓损伤,最重要的检查是A.X线检查 B.CT检查
以下对依法治校的认识错误的是()A.依法治校需要全面贯彻各项教育方针、政策
Thechangeinthatvillagewasmiraculou
患者,男性,34岁。急刹车致使方向盘挤压上腹部16小时,患者主诉上腹部、腰部及右
最新回复
(
0
)