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
Life on Mars Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still
Life on Mars Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still
admin
2008-01-17
46
问题
Life on Mars
Perhaps more than anything else, scientists are eager to find out if Martian life existed in the past—or still exists.【61】telescopes first zoomed in【62】Mars in the 17th century, people have conjured up a wild【63】of images or what Martians might look like. But space probes like the 1997 Sojourner land rover have yielded no evidence of such alien beings.
Most experts agree that if life did at one time evolve on Mars, finding evidence of that life—which would likely take the form of tiny organisms—won’t be easy.【64】, many scientists are optimistic. "We’ve got organisms on Earth that adapted to life deep【65】the surface in underground water wells, " says Stephen Clifford. "【66】life like that evolved on Mars four billion years ago, there’s no reason why it【67】today. "
【68】last year’s disappointing losses, the future of Martian exploration looks【69】This year, two major
films about fictitious Mars missions—Red Planet and Missions to Mars—are certain to heighten interest in our planetary neighbour. More important, plans for new sets of NASA orbiters and landers—one to launch in 2001 , the other in 2003—are already in the works. Without a doubt, each new mission will inch scientists closer to【70】the mysteries of planet Mars.
选项
A、wouldn’t exist
B、wouldn’t have existed
C、doesn’t exist
D、has existed
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/STLC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
在下列题中利用级数的件质和判别方法判断级数的敛散件.
Ahobbycanbealmostanythingapersonlikestodoinhissparetime.Hobbyists【B1】______pets,buildmodelshipsanythingap
Ironically,racialdiscrimination,whichis______withdemocraticprinciples,hasexistedinAmerica,"hisgreatestdemocracyi
Hethoughtthatthebadworkingconditionswouldresultinthestrikeoftheworkers.
American【B1】______aresimilartoothercities【B2】______theworld.Ineverycountry,citiesreflectthevaluesofthe【B3】___
Theauthorsuggeststhathumanresourcesmanagementshouldbetaughtasarequiredsubjectinthisschool,alongwithscienceco
Allgames______becauseoftherainstorm,manystudentscoulddonothingbutstudyintheclassroom.
Morethan30000driversandfrontseatpassengersarekilledorseriouslyinjuredeachyear.Ataspeedofonly30milesperhou
Themanagementoflogistical(物流的)operationisaboutmovementandstorageofmaterialsandfinishedproducts.Logisticaloperat
Inolddays,whenaglimpseofstockingwaslookeduponassomethingsoshockingastodistracttheseriousworkofanoffice,s
随机试题
下列有关青少年的说法错误的是()。
以脉位表浅为主要特征的真脏脉是
A.唇红B.人中点C.唇弓D.唇峰E.唇珠上下唇的游离缘,即皮肤和黏膜的移行区
患者,男,35岁,嵌顿性疝,经手法复位,护士应特别注意观察患者的
夸脱:牛奶
对判处管制,但未附加剥夺政治权利的犯罪,以下说法错误的是:()
[2014年第42题]已知反应(1)H2(g)+S(s)H2S(g),其平衡常数为K1Θ,(2)O2(g)+S(s)SO2(g),其平衡常数为K2Θ,则反应(3)H2(g)+SO2(g)O2(g)+H2S(g)的平衡常数为K3
会计档案销毁后,单位负责人应当在会计档案销毁清册上签章,并将监督销毁情况报告上级主管单位负责人。()
()的优点是极为丰富、洁净、安全、廉价。
为北方民族大融合做出杰出贡献的政治家是()。
最新回复
(
0
)