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
2012-09-19
28
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.【C9】______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 "rem(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 two milligrams; it【C17】______according to where you live, and this is a very rough estimate. Scientists have reason to think【C18】______a man can【C19】______far more radiation【C20】______without being damaged; the figure of 60 rems has been agreed.
【C18】
选项
A、what
B、which
C、that
D、why
答案
C
解析
本句应填入引导宾语从句的代词,而从句不缺少主语和宾语,因而不选择what和which,又加之主句是陈述语气,故选择that。
转载请注明原文地址:https://kaotiyun.com/show/mw57777K
0
大学英语四级
相关试题推荐
AdetailedandthoroughresearchprojectundertakenbytheOpenUniversityrecentlyreportedthattheirevidenceappearstoshow
A、Theyfeelsafebecausemallshavepolicestationofprivatesecurityguards.B、Theycanbeservedfreemealsafterdoingshopp
Nothingcanbewasted,andweare____________(从不为有多余的食物困扰)becausewehaveneverhadany.
A、Becausetheyareinahurry.B、Becausetheyarestrange.C、BecausetheycannotwatchTV.D、Becausetheyhaveotherschedules.
A、Becausehehadsomeproblemswiththereadings.B、Becausehewantedtochangeclasses.C、Becausehewasthinkingaboutbecomin
A、Becausetheoldonecouldnottransfersignalsclearly.B、Becausetheoldonecouldnotsendmessagesquicklyenough.C、Becaus
随机试题
=().
急性下壁心肌梗死最易合并
一足月儿,生后2天,出现黄疸,肝脏略肿大。血总胆红素255μmol/L(15mg/dl),血型A型,Rh阳性,直接抗人球蛋白试验阴性,抗体释放试验IgG抗A抗体阳性。此患儿诊断为
当事人一方为与不特定的多数人进行交易而预先拟定的,且不允许相对人对其内容作任何变更的合同,称为()。
公司信贷客户市场细分的方法中,按照产业生命周期的不同,可划分为新兴产业和夕阳产业。()
根据中国人民银行2005年发布的《全国银行间债券市场金融债券发行管理办法》的规定,商业银行发行金融债券应具备的条件有()。
劳动力的价值是由生产和再生产劳动力所需要的社会必要劳动时间决定的。在劳动力价值构成上,劳动力商品的价值决定与其他商品相比还具有一个突出的特点,这就是()
有以下程序:#include<stdio.h>inta=1.b=2:voidfunl(inta,intb){printf("%d%d",a,b);}voidfun2(){a=3;b=4;}main(){funl(5,6);f
Whenwillthebankopentomorrow?
EuropeancountrieshavebeencarefullywatchingtheviolencethatexplodedacrossFrance,worriedthattheirvehiclesandbuildi
最新回复
(
0
)