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
2013-01-20
80
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【C1】______our protective blanket on【C2】______. Light gets through, and this is essential【C3】______plants to make the food which we【C4】______. Heat,【C5】______, makes our environments tolerable and some ultraviolet rays(紫外线)penetrate the【C6】______. Cosmic(宇宙的)rays of various kinds come【C7】______the air from outer space, but【C8】______quantities of radiation from the sun are screened off. As【C9】______as men leave the atmosphere they are【C10】______to this radiation;【C11】______their spacesuits or the walls of their spacecraft, if they are inside,【C12】______prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in【C13】______. Doses of radiation are measured in【C14】______called "rems(雷姆)". We all【C15】______radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The "【C16】______"dose of radiation that we receive each year is about 100 millirems; it【C17】______according to where you live, and this is a very rough estimate. Scientists have reason to think【C18】______a man can【C19】______up with far more radiation【C20】______this without being damaged; the figure of 60 rems has been agreed.
【C16】
选项
A、conventional
B、common
C、general
D、normal
答案
D
解析
词义辨析题。conventional意为“传统的”,common意为“共同的,普通的”,general意为“一般的,总体的”,normal意为“正常的”。本句意为“我们每年接受的.______辐射量…”,只有normal符合句意,所以D正确。
转载请注明原文地址:https://kaotiyun.com/show/x9u7777K
0
大学英语四级
相关试题推荐
InbothChinaandDenmarkchildrenare【S1】______andtheyreceiveagreatdealofattention.However,thewaychildrenareraised
Whenyouthinkaboutthegrowthofhumanpopulationoverthelastcenturyorso,itisalltooeasytoimagineitmerelyasani
A、BritainshouldjointheEECearlier.B、ItisnecessaryforBritaintostayin.C、ItisdifficultforBritaintoliveintheEE
AreYourKidsEatingJunk?DevelopHealthyEatingHabitsInYourChildrenTheotherdayIwatchedaveryinf
A、Becausetheyfeeldepressedwithamaletrainer.B、Becausetheythinkafemaletrainerismorecaring.C、Becausetheywantaf
A、Askhisclassmates.B、Lookupsomeinformation.C、Goonlinetocheckthem.D、Discussthemwithhisteachers.D行动计划题。女士问男士如果在学习
A、Hewasfinedforviolatingtrafficrulestwice.B、Hedidn’tseethesignbecauseofthedimlight.C、Hegothistwoticketsba
A、Studyingcommerce.B、Readingastory.C、Enjoyingtheads.D、WatchingTV.D女士让男士帮忙挪沙发,男士说Themovieissointeresting…youwait…t
DoctorsinBritainarewarningofanobesitytimebomb,whenchildrenwhoarealreadyoverweightgrowup.So,whatshouldwedo?
ForanygiventaskinBritaintherearemorementhanwomenareneeded.StrongunionskeepthemthereinFleetStreet,homeofs
随机试题
下列不属于肌松药的是
八脉交会穴中常与内关配和使用的是()八脉交会穴中常与足临泣配和使用的是()
2岁女孩,发热、咳嗽、气促1周,查体:精神不振,面色苍白,呼吸困难,皮肤可见荨麻疹样皮疹,双肺可闻及细湿啰音,X线检查显示:多发性小脓肿,易变。根据本病例诊断最大可能性是
"胃之关"指的是
企业将接受捐赠的固定资产登记入账时,可能贷记的科目有()。
下面情况发生了学习的是()。
薛某拖欠潘某借款5万元,潘某多次催要借款而薛某一直不给。在一次催要过程中,二人发生争执并大打出手,薛某将潘某殴打致伤。区公安分局遂以薛某违反《治安管理处罚法》为由,将薛某行政拘留10天。薛某不服,提起行政复议。复议机关作出复议决定,薛某仍不服,于是向法院提
下列政府活动中,不属于组织职能范畴的是()。
2014年1-7月份,全国商品房销售面积56480万平方米,同比下降7.6%,降幅比1-6月份扩大1.6个百分点。其中,住宅销售面积下降9.4%,办公楼销售面积下降4.9%,商业营业用房销售面积增长7.4%。商品房销售额36315亿元,同比下降8.2%,降
侵权责任的免责事由。[中山大学2011年研]
最新回复
(
0
)