首页
登录
职称英语
[originaltext] Science fiction writers have often imagined humans going to l
[originaltext] Science fiction writers have often imagined humans going to l
游客
2025-01-14
22
管理
问题
Science fiction writers have often imagined humans going to live on the Mars. But these days, scientists are taking the idea seriously. It has a great deal to recommend it, since it might solve the problem of overcrowding on the earth. But obviously, it would not be worth making the effort unless people could live there naturally. If the atmosphere were like that of the earth, this might be possible. But in fact it is mostly carbon dioxide. Apart from that, there are other problems to be overcome. For example, the temperature would have to be raised from 6 degrees below zero to 15 degrees above it. Scientists who study Mars have laid down the program that they can follow. To begin with, they will have to find out whether life has ever existed on the planet of Mars in the past. Secondly they will have to make a reliable map of its surface. And finally, they will have to make a list of the gases. Above all, they will have to discover how much nitrogen it possesses. Since nitrogen is four fifths of the air we breathe, they are surprisingly optimistic about raising the temperature on Mars and believe it could be done in a hundred years. It will take a bit longer, though, to transform the atmosphere so that human beings could live there. Scientists estimate this will take one hundred thousand years.
Q. 15. Why are scientists interested in Mars?
Q. 16.What is the one of the things that must be done for a man to live on Mars?
Q.17.Why do scientists want to find out whether there is sufficient nitrogen on Mars?
Q. 18.What is the prospect of people living on Mars?
选项
A、Its chemical elements must be studied.
B、Its temperature must be lowered.
C、Big spaceships must be built.
D、Its atmosphere must be changed.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3912751.html
相关试题推荐
[originaltext]PeopleintheU.S.,whentheyattainlegalmarriageageandme
[originaltext]PeopleintheU.S.,whentheyattainlegalmarriageageandme
[originaltext]WOMAN:Dad!MAN:Yes?What’sthematter?WOMAN:I’mwonderingif
[originaltext]WOMAN:Dad!MAN:Yes?What’sthematter?WOMAN:I’mwonderingif
[originaltext]BilltoldmethathewouldgraduateinJuneifhecouldgetthec
[originaltext]BilltoldmethathewouldgraduateinJuneifhecouldgetthec
[originaltext]JeffseemedtobenomoresurprisedthanIdidwhenwelearnedth
[originaltext]JeffseemedtobenomoresurprisedthanIdidwhenwelearnedth
[originaltext]JeffseemedtobenomoresurprisedthanIdidwhenwelearnedth
[originaltext]JeffseemedtobenomoresurprisedthanIdidwhenwelearnedth
随机试题
[originaltext]M:Jean,Areyouinterestedinworkinginthemarketingdepartmen
有关椎骨的叙述,错误的是A.椎骨包括7个颈椎,12个胸椎和5个腰椎,以及骶骨和尾
患者男,12岁。体温38℃,阵发性刺激性咳嗽,咳少量黏液痰,胸片见肺部多种形态浸
阅读下面的材料,根据要求写作。 温家宝同志曾说过:“作为一名教师,首先要有爱心
简述知觉的组织原则。
乙状结肠扭转时钡灌肠的典型X线征象是 A.杯口征或弹簧征B.鸟嘴征C.铅管
资金周转周期的延长引起的借款需求可能与()有关。A.设备使用年限 B.存货周
具有分析能力、人际沟通能力和情绪控制能力的强强组合特点的职业生涯锚是()。A.
下列签章文件中,属于施工组织管理文件的有( )。A.工程开工报告 B.分包单
重症一氧化碳中毒患者的最有效的治疗措施是( )。A.鼻导管间断低流量吸氧 B
最新回复
(
0
)