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
16
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:https://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
[originaltext]Wearenowlivinginaworldinwhichrobotsaretakingover
EnglishSynonymsThegradualincorporation
TheNextDisaster:AreWeReady?AreWeReall
[originaltext]M:Ireallydon’tknowwhattodothissummer.Ican’taffordto
UV光谱有两个吸收带,带Ⅰ在312nm,带Ⅱ在276nm,带Ⅱ比带Ⅰ强很多,该化
(1)进行跨省“征婚”(2)生态环境被破坏(3)近亲繁殖(4)交配成功(
罗马最大的广场图拉真广场的轴线(),做多层纵深布局。A.交错 B.穿插
下列说法正确的是()。 A.以投资促进发展的战略适合正常发展至成熟阶段的企业
一天中人体生长激素水平最高的时段是 A.清晨B.中午C.快波睡眠D.慢波
下列统计分析中,需要采用推断统计方法的有()。A.利用图表对数据进行展示 B
最新回复
(
0
)