首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
At the first sight the planet Mars does not appear very welcome to any kind of life. It has very little oxygen and water, the te
At the first sight the planet Mars does not appear very welcome to any kind of life. It has very little oxygen and water, the te
admin
2012-05-11
51
问题
At the first sight the planet Mars does not appear very welcome to any kind of life. It has very little oxygen and water, the temperature at night is below ~50°Cand winds of 100 miles per hour cause severe dust storms. However, the surface of the planet seems to show that water flowed across it some time in the past, and it is believed that there is enough ice at the poles to cover the planet with water if it melts. Although there is no life on the Mars now, some scientists think that there may have been some form of life long time ago. At that time, the planet had active volcanoes; the atmosphere was thicker and warmer; and there was water. In fact, in some ways the Mars may have been similar to the Earth, where life exists.
Some people believe that the Mars could support life in the future if the right conditions were produced. The first step would be to warm the planet using certain gases which trap the Sun’s heat in the planet’s atmosphere. With warmth, water and carbon dioxide (二氧化碳), simple plants could begin to grow. These plants could slowly make the Mars more suitable for living. It is estimated that the whole process might take between 100,000 and 200,000 years. In the meantime, people could begin to live on the planet in special closed environments. They would provide a lot of useful information about conditions on the Mars and the problems connected with living there.
There could be life on the Mars in the future if_____.
选项
A、it supported life in the past
B、certain gases are used to cool the planet
C、the atmosphere can be heated enough to grow simple plants
D、the planet’s volcanoes become as active as they were in the past
答案
C
解析
第二段大意是:如果要想改变火星的条件使之适合居住,首先要提高星球的温度,其方法是用某些气体收集太阳的热能。有了温度、水和二氧化碳,一些植物便可生长。慢慢地使星球适合生存。选项C,“人们可以以提高环境的温度的方式来使一些植物生长”是正确的。
转载请注明原文地址:https://kaotiyun.com/show/UdlC777K
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
ItwasaquarterpastnineasMariehurriedintotheofficebuildingwhereshewasgoingtowork.Herbusmovedslowlyalongthr
IwasonlyeightyearsoldwhentheSecondWorldWarended,butIcanstillremembersomethingaboutthevictorycelebrationsin
Myfatherwavedmegood-byeandthebussetoff.Thepersonsitting【C1】______tomewasanengineergoingtoPeshawartoinspect
Somepeoplearguethatthepressureoninternationalsportsmenandsportswomenkillstheessence(真谛)ofsport--thepursuitofpe
WelcometoLanguageuponThames.ThisbrochurehasbeendesignedtogiveyouanoverviewofourLanguageSchoolandthecourses
Iwillaskmyfathertotelephoneyou_____hecomesback.
Althoughmanyofthehousesinthesmalltown_____stillinneedofrepair,there______lotsofimprovementintheirappearance.
Therearethousandsofdifferentlanguagesintheworld.Everyoneseemstothinkthathisnative(本国的)languageisthemostimpo
Wouldyouliketospendalleveningreadingalovelystorywithbeautifulillustrationsandmake$35,000atthesametime?Milli
随机试题
李明:“目前我国已经具备了开征遗产税的条件。我国已经有一大批人进入了高收入阶层,遗产税的开征有了雄厚的现实经济基础。我国的基尼系数已超过了4.0的国际警戒线,社会的贫富差距在逐渐加大,这对遗产税的开征提出了迫切的要求。”张涛:“我国目前还不具备开征遗
下列哪项不属于我国法律关系的主体:()。
甲、乙双方签订了买卖合同,在合同履行过程中,发现该合同履行费用的负担问题约定不明确。根据《中华人民共和国合同法》的规定,在这种情况下,可供甲乙双方选择的履行规则有()。
以下属于个人事故的是()。
多尼采蒂是()作曲大师。
三十六计是根据我国古代卓越的军事思想和丰富的斗争经验总结出来的三十六条谋略,在我国军事史上得到了充分的验证。下列战役中成功运用三十六计中以逸待劳之计的是()。
兄弟两人早晨6时20分从家卫出发去学校,哥哥每分钟行100米,弟弟每分钟行60米,哥哥到达学校后休息5分钟,突然发现学具忘带了,立即返回,中途碰到弟弟,这时是7时15分。从家到学校的距离是多少米?
东方股份有限公司(以下简称东方公司)是一家上市公司,该公司对所得税的会计处理采用资产负债表债务法进行核算,适用的所得税税率为33%,适用的增值税税率为17%,假定不考虑其他纳税调整事项,东方公司按净利润的10%提取法定盈余公积。经董事会批准,该公司2003
うみをみると、いつもこどものころを______。
Theoutbreakofsevereacuterespiratorysyndrome(SARS,非典),whichhasnoknowncurefor【C1】______afflictedbyit,hasbrough
最新回复
(
0
)