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
62
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://kaotiyun.com/show/Ky37777K
0
大学英语四级
相关试题推荐
A、Theywererepeatedlyrejectedbyshops.B、Theywerepopularwithherclassmates.C、Theyshowedhernaturaltalent.D、Theywere
IntotheUnknownA)Theworldhasneverseenpopulationageingbefore.Canitcope?B)Untiltheearly1990snobodythou
FlexibleStudyfortheFutureUniversitiesA)Forabriefperiod,thepopularimageoftheuniversitystudentwasembodiedb
A、Thenewtechnologyusedtobuildroads.B、Theabilitytotransportgoodsacrosstheworld.C、Thefastgrowingtradeingraina
A、Itrequiredallchildrentogotoschool.B、Itloweredtheageofattendingschool.C、Itraisedtheageofleavingschool.D、I
A、Becauseheneedstobookaflight.B、Becauseheintendstotravelinthecountry.C、BecausehehopestoreturntotheUS.D、Be
A、Twelve-gradestudents.B、Studentswhosefathersarefarmers.C、Studentslearningagriculture.D、Studentswhohavelearnedmath
TheU.S.andChinadon’tagreeonmuchthesedays.GermanyandFranceshareaborderandacurrencybutarefrequentlyatodds.
A、Europeancountriestendtosupporthavingnaps.B、Workingmenshouldhaveanapregularly.C、Adultsaremorelikelytodevelop
Whentheauthorsaysthecreativemindandthecriticalmind“cannotworkinparallel”(Line4,Para.1)inthewritingprocess,
随机试题
女孩4岁,因高热2小时,惊厥2次,无呕吐腹泻,于1995年8月就诊。发病前曾去公园玩。吃过苹果、葡萄。体检:体温40.2℃,重病容,神志欠清,面色青灰,四肢凉,血压7.5/4.5kPa。该病儿最可能的诊断是
右心衰竭患者典型的体征是
押品价值评估的主要方法有()。
下列有关相关者利益最大化目标的说法中,不正确的是()。
甲乙签订一份买卖合同,约定违约方应向对方支付18万元违约金。后甲违约,给乙造成损失15万元。根据合同法律制度的规定,下列说法正确的是()。
下面是某教师执教《秦朝中央集权制度的建立》一课的教学片段,结合材料回答相关问题。材料教师谈及秦始皇发明了“朕”这个皇帝的自称。一个学生发问:“老师,秦朝之前的国王自称什么呢?”教师并没有马上回答,而是面向全班说:“这是一个突如其来而且很具挑战
党的领导与政府领导虽然在性质、职能等方面有区别,但加强公安工作的目标是一致的,大政方针是统一的。()
娱乐体育是指人们在余暇时间进行的一种娱乐性极强的身体活动,它既是一种娱乐手段,又是一种锻炼身体的手段。根据上述定义,下列不属于娱乐体育的一项是()
拜占庭帝国长期延续的原因。
ThreeConceptsinArtHistoryI.Commonalities-Certainchunkof【T1】______,withinwhich【T2】______weresharedII.
最新回复
(
0
)