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
Space is a dangerous place, not only because of meteors(流星)but also because of rays from the sun and other stars. The atmosphere
Space is a dangerous place, not only because of meteors(流星)but also because of rays from the sun and other stars. The atmosphere
admin
2009-09-12
42
问题
Space is a dangerous place, not only because of meteors(流星)but also because of rays from the sun and other stars. The atmosphere again acts【B1】our protective blanket on【B2】. Light gets through, and this is essential【B3】plants to make the food which we【B4】. Heat, 【B5】, makes our environments tolerable and some ultraviolet rays(紫外线)penetrate the【B6】. Cosmic(宇宙的)rays of various kinds come【B7】the air from outer space, but【B8】quantities of radiation from the sun are screened off. As【B9】as men leave the atmosphere they are【B10】to this radiation;【B11】their spacesuits or the walls of their spacecraft, if they are inside,【B12】prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in【B13】. Doses of radiation are measured in【B14】called "rems(雷姆)". We all 【B15】 radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The "【B16】"dose of radiation that we receive each year is about 100 millirems; it【B17】according to where you live, and this is a very rough estimate. Scientists have reason to think【B18】a man can【B19】up with far more radiation【B20】this without being damaged; the figure of 60 rems has been agreed.
选项
A、for
B、on
C、with
D、as
答案
D
解析
惯用搭配题。act与with通常不构成搭配,而act for意为“代表,代理”,act on意为“按照”,act as意为“充当,起…作用”,只有act as符合句意,在句中意为“大气层起到保护毯的作用”,所以D正确。
转载请注明原文地址:https://jikaoti.com/ti/MlDFFFFM
0
大学英语四级
相关试题推荐
A、Theirdifferencesarelikelytoimpactproductivity.B、Theirsimilarityisconducivetofuturecollaboration.C、Theirconnecti
A、Studyfashiondesignatcollege.B、Improvehermarketingstrategy.C、Adddesignsforwomen.D、Expandherbusiness.D细节推断题。男士问女
Afewweeksago,awell-meaningprofessortriedtoexplainthephysiologicalprocessbehindvirusesandthehumanbodyinatwee
A、Theyhavenosteeringwheelsorpedals.B、Theyhavebeenaskedtostopfordrivingtoofast.C、Theyhaveneverbeeninvolvedi
A、Itislosingenergy.B、Itisrotatingonceevery26.8days.C、Itismovingfurtherawayfromtheearth.D、Itistravellingfas
A、Studentsdoalotofdrillsandtests.B、Teachersofferalotofinformationongrammar.C、Studentsdoalotofpractice.D、Th
Anewstudyfoundthatinner-citykidslivinginneighborhoodswithmoregreenspacegainedabout13%lessweightoveratwo-yea
TheenergycrisisinAmericadiscussedheremainlyreferstoashortageoffossilfuels.LauraHillenbrandisanexamplecited
Hewasappointeddirectorofthisdepartment,____________________(考虑到他的工作努力)andcheerfulcharacter.
A、StPaul’s.B、TheGuildhall.C、ThamesSquare.D、ThamesRiver.CWhichofthefollowingisnotmentionedinthepassage?
随机试题
1990年“阿里安”火箭爆炸,是由于工作人员不慎将一块小小的擦拭布遗留在发动机的小循环系统中。关于这个事故,你的感受是()。
当同时存在水、电解质和酸碱平衡失衡时,首先应()
属于拔牙禁忌证的是()
A.龋均B.CPIC.Dean指数(氟牙症指数)D.简化口腔卫生指数E.龈沟出血指数评价人群口腔卫生状况主要用
甲公司辅助生产成本不通过“制造费用”科目核算,当月辅助生产车间A提供劳务总量为350小时,成本为50万元,其中为基本生产车间提供辅助劳务300小时,为辅助生产车间B提供劳务50小时;辅助生产车间B提供劳务总量为600小时,成本为80万元,其中为基本生产车间
ThewayofthinkinginEnglishisquiteimportantforEnglishlearners.Buthowcanyoudothat?Ithinkthebestwayisto【C1】_
存储器的内容可以随机地读出和写入,但掉电后数据就会丢失的存储器是( )。
一棵二叉树中共有80个叶子结点与70个度为1的结点,则该二叉树中的总结点数为
Whatarethetwospeakersmainlytalkingabout?
Workisoneofsociety’smostimportantinstitutions.Itisthemainmechanismthroughwhichspendpowerisallocated.Itprovid
最新回复
(
0
)