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
外语
Venus, one of the four inner planets of our solar system, is the closest body in the sky apart from the Moon, sometimes coming o
Venus, one of the four inner planets of our solar system, is the closest body in the sky apart from the Moon, sometimes coming o
admin
2010-01-15
79
问题
Venus, one of the four inner planets of our solar system, is the closest body in the sky apart from the Moon, sometimes coming only 40 million km from the Earth. Thus, in the not- so-distant future, when man has colonized the Moon, he will start looking at Venus as his next step into space.
As it is now, Venus’s environment is totally unfavourable to human life. Its surface temperature is almost 480℃. Its face is almost completely hidden from view by poisonous clouds of 90% carbon dioxide.
But scientists have a simple plan which, they predict, could make Venus habitable.
With the help of rockets, they plan to bombard the carbon dioxide clouds with colonies of blue-green algae. Experiments carried out on Earth have proved that blue-green algae can survive and reproduce normally in such an environment. The algae will consume the carbon and liberate the oxygen. They reproduce so quickly that the carbon dioxide could be broken down within one year. After that, the surface of Venus will be partly visible to telescopes on Earth.
The increase in oxygen will have spectacular effects on the desert planet. As oxygen re- places the carbon dioxide, the sun’s infra-red radiation, which up to that moment was trapped under the clouds of carbon dioxide, will escape into space and the temperature of the lower atmosphere will decrease. Soon, water will collect from the atmospheric vapor and rain will start falling for the first time. That first rain will never reach the surface. It will vaporize into steam high up in he Venusian atmosphere, but it will have a very important effect. It will lower the ground temperature, perhaps by 35℃. Soon the rain will fall again and again, until the ground temperature is about 70℃. Then the "Big Rain" will strike the soil of Venus for the first time and the clouds will partly clear away, leaving an oxygen-rich atmosphere and a temperature cool enough to sustain hardy plants and animals from Earth.
Which of the following is the most appropriate title for the passage?
选项
A、Venus--Man’s Colony in the Space
B、Can Venus be Made Habitable?
C、Blue-Green Algae--the Only Survivor on Venus
D、A Plan to Make Venus Cooler
答案
B
解析
根据全文综合判断可知此题选B。
转载请注明原文地址:https://kaotiyun.com/show/1nnK777K
0
专业英语四级
相关试题推荐
StudyActivitiesinUniversityInordertohelpcollegeanduniversitystudentsintheprocessoflearning,fourkeystudya
PASSAGEFOURWhatistheopportunitytoattracttheMySpacecrowdaccordingtoMcGuire?
HowtoWriteaBookReviewI.ThedefinitionofabookreviewA.adescriptiveandcriticalorevaluativeaccountofabook
FiveCommonMistakesinConversationsandTheirSolutionsI.NotlisteningA.Problem:mostpeople【T1】________
(1)Therewasmusicfrommyneighbor’shousethroughthesummernights.Inhisbluegardensmenandgirlscameandwentlikemo
ThroughouttheU.S.studentsaregettingouttheirNo.2pencils,readyendureastress-packedfourhoursofbubblinginanswers
A、Theprimaryschoolsector.B、Thecollegesector.C、Thegovernmentschoolsector.D、Thenon-governmentschoolsector.D
Effortstoeducatepeopleabouttherisksofsubstanceabuseseemtodetersomepeoplefromusingdangeroussubstances,ifsuch
Themenonboardtheshippulledinthedriver______theyfearedwasseriouslyinjured.
Themenonboardtheshippulledinthedriver______theyfearedwasseriouslyinjured.
随机试题
企业的财产属于()。
A链霉素;B四环素;C两者均是;D两者均不是;可能发生牙齿变色、骨髓生长抑制的是
炉甘石的功效是雄黄的功效是
工程变更不能超出合同规定的工程范围。如果超过了这个范围,承包商()。
()是指公司、企业在销售商品、提供劳务及让渡资产使用权等日常活动中形成的经济利益总流入。
甲公司以10辆汽车换取乙公司30台机器设备。在交换日,甲公司10辆汽车的账面价值为80万元,公允价值为100万元;乙公司30台机器设备的账面价值为60万元,公允价值为90万元;甲公司向乙公司收取货币资金10万元。假定不考虑相关税费.该项交换具有商业实质,甲
银行需要按照融资工具类别、资金提供者的性质和市场的地域分布来审查对各种融资来源的依赖程度。对银行来说进行(),保持与负债持有人和资产出售市场的联系,至关重要。
经济规律:法则
Theemployeesworkedhardbecause________.Mr.Whitefellinafaintbecause________.
A、12.B、16.C、18.D、20.B当学生16岁毕业后,他们可以选择工作,或上大学。
最新回复
(
0
)