首页
登录
职称英语
[originaltext] Not long ago it was assumed that the dangers man would meet i
[originaltext] Not long ago it was assumed that the dangers man would meet i
游客
2023-09-09
56
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.
(26)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. (28) 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.
(28) 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 (27) 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
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/2999891.html
相关试题推荐
[originaltext]M:Goodmorning.I’dliketospeaktoMr.Picasso,please.W:Mr.
[originaltext]M:Goodmorning.I’dliketospeaktoMr.Picasso,please.W:Mr.
[originaltext]TheChinesepeople,Ifoundout,holdontomanytraditionstha
[originaltext]TheChinesepeople,Ifoundout,holdontomanytraditionstha
[originaltext]M:Mygrandfatherlookedforwardtoretirement,sothathewould
[originaltext]M:Mygrandfatherlookedforwardtoretirement,sothathewould
[originaltext]M:Goodmorning.W:Goodmorning.Haveaseat,please.M:Thanky
[originaltext]W:You’llhavetohurryifyoureallywanttocatchtheflight.T
[originaltext]W:You’llhavetohurryifyoureallywanttocatchtheflight.T
[originaltext]W:You’llhavetohurryifyoureallywanttocatchtheflight.T
随机试题
HowtheCIAWorks[A]DespiteplentyofHollywoodfilmsabouttheCIAan
OurgreatestresponsibilityistheactivedefenseoftheAmericanpeople.Twe
可治疗甲型和丙型肝炎的是()A:红霉素 B:咪康唑 C:庆大霉素 D:阿
患者,女性,18岁,从田里干完农活回家,误将装在饮料瓶里的敌敌畏喝了两口,意识清
大建中汤的组成药物是A.生附子、干姜、肉桂、炙甘草 B.蜀椒、人参、干姜、
适宜在药斗中靠近存放的饮片是A:形似的饮片B:相反的饮片C:相畏的饮片D:
在利益多元、信息网络高度发达的今天,政府的施政离不开公众参与。闭门造车、我行我素
除了专门组织的教育教学活动以外,幼儿在园内的所有活动都包含在( )之中,这是幼
A.虫蛀 B.霉变 C.挥发 D.沉淀 E.酸败口服液在贮藏中易
地方性克汀病是由于何种原因所致A.婴儿期摄入氟过多 B.母体妊娠期间摄入过多非
最新回复
(
0
)