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 atmosphe
Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphe
admin
2013-02-24
19
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.
【C7】
选项
A、across
B、to
C、from
D、through
答案
D
解析
介词用法题,本句意为“各类来自太空的宇宙射线 ______ 大气层”,只有come through 与句意相符,在此相当于penetrate (穿透),所以D正确,come across 意为“偶遇”,come to 意为“来到”,come from 意为“来自”,均与句意不符
转载请注明原文地址:https://jikaoti.com/ti/BWwFFFFM
0
大学英语四级
相关试题推荐
Internetdatashowsthatyoungeradultshavebecometheprimaryaudienceobsessed(着迷)withalteringtheirpersonalappearance.
Internetdatashowsthatyoungeradultshavebecometheprimaryaudienceobsessed(着迷)withalteringtheirpersonalappearance.
A、Theyaretoopoor.B、Itisunusualtoseekcare.C、Theycanremainunaffectedforlong.D、Therearetoomanypeoplesuffering
A、Takeadeepbreathandtrytoforgetyournervousness.B、Drawbackfromthegroupandtrytocalmdown.C、Lookforthepeople
A、Farmers.B、Citypeople.C、Businesspeople.D、Students.A选项表明,本题与某一行业的人群有关。由女士提到的Itwasreallypopularamongfarmers可知,农民很喜欢这样
A、HerIDcardandpassport.B、Herpersonalreferences.C、Hersocialsecuritynumber.D、Hercoverletter.B选项中的HerIDcard,Herpe
StepstoMoreHappinessTurningPointsThereis,formanyofus,amomentinlifewhenwemakeachoicethatchangesusfore
A、Becauseshedoesn’twanttorelyonherrelativestoomuch.B、Becauseshecanfindasatisfactoryjobherself.C、Becausesheh
A、Heisunpleasanttobewith.B、Heisanintrovertedperson.C、Heisveryenthusiastic.D、Heiseasygoing.A此题问的是Leila的兄弟是怎样一
随机试题
FakeholidayvillawebsitespromptwarningA)DuringtheBritishwinter,thethoughtoftwoweeksinacoastalvilla(别墅)w
下列选项中不属于杜威教育思想的是()
用盐水洗涤蔬菜可使蔬菜中的虫卵和腻虫在盐水的作用下脱落,从而洗掉虫卵和腻虫。()
平原地区城市道路机动车最大纵坡宜控制在()以下,最小纵坡应大于或等于()。
性质不同的填料,应水平分层、分段填筑,分层压实。同一水平层路基的全宽应采用同一种填料,不得混合填筑。每种填料的填筑层压实后的连续厚度宜大于()。
法律由国家制定或认可,为统治阶级意志所决定。()
若有4个进程共享同一程序段,每次允许3个进程进入该程序段,用P、V操作作为同步机制,则信号量S的取值范围是()。
多边贸易谈判
设随机变量X的概率分布P(X=k)=,k=1,2,…,其中a为常数。X的分布函数为F(x),已知F(b)=,则b的取值应为________。
Oxfordisacitywithsuchamind-blowingreputationthatmanywhocomeherefindthemselves______bytheplaceandcan’twaitt
最新回复
(
0
)