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
22
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.
【B7】
选项
答案
be about to
解析
转载请注明原文地址:https://kaotiyun.com/show/Wse7777K
0
大学英语四级
相关试题推荐
Forthispart,youareallowed30minutestowriteashortessay.Youshouldstartyouressaywithabriefdescriptionofthepi
PreparingforMoreExpensiveDegreesinEnglandA)Balancingatightbudgetisoneofthemostdifficultaspectsofbeingastude
Demandissoaringforshortcourses,fromdrummingtoshoe-making,amongpeopleseekingaportfoliocareer—andit’sgoodnewsfo
A、Heisagoodboss.B、Heisgoodcompany.C、Heishumorous.D、Heisalittlestupid.B女士认为John非常有幽默感,男士说自己第一次见到John的时候,觉得他有一点沉默
A、Becauseshewasencouragedbyherfather.B、Becauselawyersatthattimereceivedhighpay.C、Becauseshewasinfluencedbya
A、Jointheteamthreeyearslater.B、Spendlesstimeonhomework.C、Giveupmusicforthemoment.D、Tryherbesttowinaprize.
A、Gohometogetabook.B、Returnabooktothelibrary.C、Askthelibrarianforhelpinfindingabook.D、Takeabookfromthe
A、Helefthismealticketsinthecafeteria.B、HewastedtoomuchtimeonTV.C、HecannotcontrolhimselftoswitchofftheTV.
AcademyAwardnomineeswhogohomeempty-handedmaynothaveashinyOscarto【B1】______,buttheymayturnouttobethebigger
A、Makeacopyofhisnotes.B、Askherprofessorforhelp.C、Attendthereviewsessions.D、Gotothechemistrylabthisevening.
随机试题
某井使用CYJ5—2.1—13HB型抽油机,泵挂深度=1000mm,连杆长度L=1800mm,曲柄半径r=495mm,冲程S=1.4m,冲数n=9次/min,抽油杆柱在空气中的重力Wr=23800N,在相对密度=0.933的液体中的重力W’r=21000N
导体对电流的阻碍作用称为电阻。
A.减少房水生成B.睫状肌痉挛C.减慢心率D.增加房水排出E.浓缩玻璃体高渗药的作用机制是
首选方是:若伴见倦怠乏力,气短懒言,心悸少寐。方选:
肾盂肾炎的主要感染途径为
关于刑事诉讼价值的理解,下列哪一选项是错误的?(2015年卷二22题)
下列人员中,可以担任破产案件中的管理人的是()。
根据下面材料回答问题。下列哪类人员2009年网民人数比上年有所减少?
$10,000
Mywifeisoutofworknow,sowehaveto______ourlivingexpenses.
最新回复
(
0
)