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
A、It has a number of active volcanoes. B、It has an atmosphere like the earth’s. C、It has a large ocean under its surface. D、It h
A、It has a number of active volcanoes. B、It has an atmosphere like the earth’s. C、It has a large ocean under its surface. D、It h
admin
2017-05-31
36
问题
Since early times, people have been fascinated with the idea of life existing somewhere else besides earth. Until recently, scientists believed that life on other planet was just a hopeful dream. But now they are beginning to locate places where life could form. In 1997, they saw evidence of planets near other stars like the sun. But scientists now think that life could be even nearer in our own solar system. One place scientists are studying very closely is Europa, a moon of Jupiter. Space probes have provided evidence that Europa has a large ocean under its surface. The probes have also made the scientists think that under its surface Europa has a rocky core giving off volcanic heat. Water and heat from volcanic activity are two basic conditions needed for life to form. A third is certain basic chemicals such as carbon, oxygen and nitrogen. Scientists believe there might be such chemicals lying at the bottom of Europa’s ocean. They may have already created life, or maybe about to. You may wonder if light is also needed for life to form. Until recently, scientists thought that light was essential. But now, places have been found on earth that are in total blackness, such as caves several miles beneath the ocean. And bacteria, primitive forms of life have been seen there. So the lack of light in Europa’s subsurface ocean doesn’t automatically rule out life forming.
16. What did scientists once believe according to the passage?
17. What have scientists found about Europa, a moon of Jupiter?
18. What have scientists come to know recently about formation of life?
选项
A、It has a number of active volcanoes.
B、It has an atmosphere like the earth’s.
C、It has a large ocean under its surface.
D、It has deep caves several miles long.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/GvXC777K
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
(84)Itisoftendifficultforamantobequitesurewhattaxheoughttopaytothegovernmentbecauseitdependsonsomanydi
Thescientistswantedtokeeppeople______aboutthebreakthroughintheirexperiment.
Thefirstquestionwewilldiscussis______weshouldgotheresoearlytomorrow.
Ifyouareworriedaboutthingsandareunderalotofstressatworkorschool,thenyouareprobablynotsleepingwell.Worry
Withthedevelopmentofoursociety,thecampusnolongerbean"IvoryTower".Itisnecessaryforcollegestudentstogooutsid
Shewassodisappointed;I______herthetruth.
Despitehis______planning,theexpositionturnedouttobeafailure.
ResearchershavefoundthatREM(rapideyemovement)sleepisimportanttohumanbeings.Thistypeofsleepgenerallyoccursfour
I’maChinesestudentstudyinginCanada.IhavebeenaboarderwiththeCarsonsformorethanayearandahalf.TheCarsons
TodayistheanniversaryofthatafternooninAprilayearagothatIfirstsawthestrangeandappealingdollinthewindowof
随机试题
以概念、判断、推理的形式进行的思维是_______。
患者男性,67岁,上下颌牙列缺失,行全口义齿修复,义齿戴用两周后复诊,自述义齿容易松动脱落以下哪种情况需要重衬A.系带处缓冲不够B.义齿咬合不平衡C.义齿边缘过度伸展D.正中关系恢复不正确E.义齿边缘封闭差,基托不密合
对环境空气敏感区的环境影响分析,应考虑其预测值和同点位处的现状背景值的()的叠加影响。
性格文静的馨馨午睡时总是睡不着,为解决这个问题,黄老师耐心地告诉她天天午睡的好处,黄老师还联系家长,请家长配合,让馨馨在家里早睡早起,以帮助她养成良好的午睡习惯,可总是收效不大。经过观察,黄老师还发现,馨馨不好运动,到午睡时精神饱满,不觉疲倦,于
简述在数学课程中运用信息技术的意义及要注意的问题.
下列说法有误的是()。
近年来,猫成为A国野生动物的最大威胁,这些猫(包括宠物猫和流浪猫、野猫、农场猫等无主猫)每年捕杀动物的数量达上百亿。有动物慈善机构建议可以给猫佩戴有铃铛的项圈。带有项圈的猫比其他猫的猎捕成功率至少降低三分之一,捕杀数量也将因此而大幅减少。以下哪项如果为真,
伊斯兰教产生的背景及作用。
简述斯金纳根据强化进程的安排,对强化的分类及其含义。【首都师范大学2014】
若有以下程序#includemain(){inta=1,b=2,c=3,d=4,r=0;if(a!=1);elser=1;if(b==2)r+=2;if(c!=3);r+=3;if(d==4)r+=4
最新回复
(
0
)