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
76
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、Because people might have to migrate there someday.
B、Because it is very much like the earth.
C、Because it is easier to explore than other planets.
D、Because its atmosphere is different from that of the earth.
答案
A
解析
转载请注明原文地址:https://www.tihaiku.com/zcyy/3298190.html
相关试题推荐
Hemingwayisawriterwhoexcelledotheranywritersofhisday.A、theseotherB、
Comparedwiththeindefinablereligion,scienceisconsideredaswhatevercanbe
Anumberofwriterswhooncegreatlydisparagedtheliterarycritichaverecentl
Becausefictionwritinghadsuchlowstatus,WashingtonIrvinghadtousetheco
Supportersofgeneticengineeringhavearguedthatthisapplicationofsciencea
InsteadofpublishinginScienceorNature,the______journalsinwhichmajornew
Bakingbooksbyprofessionalfoodwriterstendtobemoremodest______.A、enchant
DanielDefoeisoneofthemostuniqueand______writersoftheeighteenthcentur
ScienceWithoutBordersScienceandtechnologyisamong
ScienceWithoutBordersScienceandtechnologyisamong
随机试题
说明:假定你是公司职员李明,给你的部门经理Sam写一张请假条。时间:3月19日1.最近经常感到头疼,想请假一天去医院做检查;2.本周工作已基本完成;
火灾是各种自然与社会灾害中发生概率高、突发性强、破坏性大的一种灾害。
腐生葡萄球菌的感染多见于A.肺炎 B.尿路感染 C.脑膜炎 D.伤口感染
下列最能体现运动员有氧耐力水平的是( )A、5千米跑 B、花样游泳 C、1
根据《证券公司另类投资子公司管理规范》下列关于另类投资业务规则的说法,错误的是(
测绘标准的复审周期一般不超过()A:2年B:3年C:4年D:5年
某房地产开发项目总建筑面积为10000m2,固定总成本为2000万元,单位变动成
母亲王某带领儿子李某去北京动物园参观,因职员张某的疏忽没有锁好笼子,致使动物园的
某女,35岁。1周来恶寒发热、鼻塞不通、头胀痛、舌苔白滑。证属外感风寒,水饮内停
有关医学模式,以下错误的是( )。A.医学模式是在不同历史阶段和医学科学水平下
最新回复
(
0
)