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
42
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://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
IncreasedScreenTimeandWellbeingDeclineinYouthA)Havey
FiveTipsforStudyingAmericanRevolutionAmericanRevolution—
设函数,则f’(x)的零点个数为A.A0 B.1 C.2 D.3
为了抑制通货膨胀,国家宏观调控部门可以采取的措施是: A.降低再贴现率B.降
导游服务是导游人员通过向游客提供劳务而创造特殊( )的劳动。A.社会价值 B.
A.驱杀绦虫,宜研末,用温开水送服 B.治疗疥癣,研末,用醋或猪脂涂患处 C
透邪解郁,疏肝理气的方剂是A.痛泻要方B.蒿芩清胆汤C.小柴胡汤D.四逆散E.半
骨与关节结核多继发于 A.肠结核B.肺结核C.肾结核D.淋巴结结核
外商间接投资是指除对外借款(外国政府贷款、国际金融组织贷款、商业银行商业贷款、出
5根弹簧系数均为k的弹簧,串联与并联时的等效弹簧刚度系数分别为()。A.
最新回复
(
0
)