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
Since early times, people have been fascinated with the idea of life existing somewhere else besides earth. Until recently, scie
Since early times, people have been fascinated with the idea of life existing somewhere else besides earth. Until recently, scie
admin
2015-10-18
13
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 planets was just a【B1】______ dream. But now they are beginning to【B2】______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【B3】______ system. One place scientists are studying very closely is Eu- ropa, a moon of Jupiter. Space probes have【B4】______ evidence that Europa has a large ocean under its surface. The probes have also made scientists think that under its surface Europa has a rocky core【B5】______ 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,【B6】______ and nitrogen. Scientists believe there might be such chemicals lying at the bottom of Eu- ropa’s ocean. They may have already created life, or may【B7】______. You may wonder if light is also needed for life to form. Until recently, scientists thought that light was【B8】______. But now, places have been found on earth that are in total blackness, such as caves several miles beneath the surface, and bacteria,【B9】______forms of life, have been seen there. So the lack of light in Europa’s subsurface ocean doesn’t automatically【B10】______ life forming.
【B5】
选项
答案
giving off
解析
转载请注明原文地址:https://kaotiyun.com/show/Jse7777K
0
大学英语四级
相关试题推荐
Moreandmoreforeignstudentsexperiencetheirindependentlifeinthequesttogainawesterneducation.They【B1】______anunfa
Forthispart,youareallowed30minutestowriteashortessay.Youshouldstartyouressaywithabriefdescriptionofthepi
Thethousandsofpeopleforcedtoabandontheirhomesinrecentweekstofloodwatersarevictimsnotjustofnaturebutofhuman
A、Theyshoulddotheirpaperasearlyaspossible.B、Theyshouldwaituntilthelastminutetodotheirpaper.C、Theyshouldn’t
ThanksgivingisAmerica’snationalholidayforgivingthankstoGod.ThanksgivingDayhasaspecial【C1】______forAmericansbecau
Trafficlightsarecrucialtoolsforregulatingtrafficflow.Theyarenot,however,perfect.Atunmanagedjunctions,apattern
WhenMomandDadGrowOldA)Theprospectoftalkingtoincreasinglyfragileparentsabouttheirfuturecanbe"oneofthemostd
Therearepeoplewhoareespeciallyattractedtothenotionof"climbingtheladder"soastoincreasetheirstatus,financialp
A、Becauseshehasgotanappointment.B、Becauseshedoesn’twantto.C、Becauseshehastowork.D、Becauseshewantstoeatina
A、Protestingtheirunequaltreatment.B、Enduringallthehardshipswillingly.C、Fulfillingtheirdreamsthroughhardwork.D、Lea
随机试题
社区护士协调卫生服务人员与居民之间的关系,此时护士承担的角色是【】
A.凝固法B.透射免疫比浊法和散射免疫比浊法C.免疫学法D.发色底物法E.以上都是血浆纤溶酶原抗原测定多采用
流行性斑疹伤寒病人禁用
在直接刺激试验中,80min后收集十二指肠内容物来测定胰液分泌量及碳酸氢钠浓度,其胰液分泌量和碳酸氢钠浓度的正常值分别是
A.幼儿急疹B.风疹C.麻疹D.水痘E.猩红热最需要与化脓性脓疱疹相鉴别的疾病
某投机者以7800美元/吨买入1手铜合约,成交后涨到7950美元,为防下跌,他应于()美元价位下达止损单。
下列关于影响股票价格波动的微观因素的描述中正确的是()。
探究学习实施的过程是()
InQuestion4,youwillbeaskedtolistentoaspeakerandreadashortpassageonthesametopic.Thetopicusuallyinvolvesa
Asweknow,women’ssocialstatushavebeenimproved.Buttheycan’teliminateallthediscriminations.Youareaskedtowritea
最新回复
(
0
)