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
2023-12-23
25
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、It influences the surface temperature of Mars.
B、It protects living beings from harmful rays.
C、It keeps a planet from overheating.
D、It is the main component of the air people breathe.
答案
D
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3298192.html
相关试题推荐
Whatsocialfunctionmaythestrangelyshapedtailfeathershave?[originaltext]
WhichofthefollowingisNOTanareaincludedbyMENAP?[originaltext]TheIMFf
Whatisthemaindutyoftheexecutivetoberecruited?[br][originaltext]
WhathasDonaldTrumpbeendoinginthepasttwoyears?[originaltext]Twoyears
Howmanyremainshavebeenclearlyidentified?[originaltext]Authoritiessifted
Whichofthefollowingistrueaccordingtothepassage?[originaltext]Duringth
ChinesepeoplehaveshownevidentinterestinAfricanproducts.[originaltext]Le
Whichofthefollowingstatementsiscorrect?[br][originaltext]China’sfu
Whichofthefollowingstatementsiscorrect?[br][originaltext]China’sfu
Whatisthemaintopicofthepassage?[br][originaltext]Rapidpopulation
随机试题
C
红黏土的形成所必须具备的条件有()。A.地形条件 B.水文条件 C.岩性
资料(一) W集团创立于1988年,是一家从房地产发展起来的企业。20
A市统计局在2014年的工作中取得了较为优异的工作成绩,赵某是该统计局的一名工作
下列关于糖皮质激素所引起的不良反应,错误的是()A.高血压 B.高血
洁净室空气环境使用A.0.2%苯扎溴铵 B.干热灭菌 C.热压灭菌 D.微
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
关于城市燃气输配管道的压力表述中,正确的有()。A.高压燃气管道A:0.8
患者水肿延久不退,肿势轻重不一,四肢或全身浮肿,以下肢为主,皮肤瘀斑,腰部刺痛,
1956年苏共二十大召开以后,以毛泽东为核心的党的第一代中央领导集体发表了《论无
最新回复
(
0
)