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
2013-05-19
41
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 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 "rems" (雷目). 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 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】______far more radiation【C20】______without being damaged; the figure of 60 rems has been agreed.
【C11】
选项
A、but
B、because
C、so
D、so that
答案
A
解析
本句前半句的意思是:“人们一离开大气层就会接触射线”;后半句的意思是:“他们的太空服和太空船会阻止射线造成的损害”。前后应该是转折关系,故用but。
转载请注明原文地址:https://kaotiyun.com/show/Mbg7777K
0
大学英语四级
相关试题推荐
Inrecentyearsanewfarmingrevolutionhasbegun,onethatinvolvesthe【C1】______oflifeatafundamentallevel--thegene.The
A、Themanageroftheshop.B、Oneassistantoftheshop.C、Onecustomeroftheshop.D、Apassengeracrosstheshop.B
ManandNatureThebalanceofnatureisadelicatesystemofchecksandcounter-checks.Naturehasitsownwayofchecking
Euthanasia(meaning"easydeath"inGreek)istheactofinducingagentle,painlessdeath.Inrecent【B1】______thetermhascom
Themedicalwrongdoingdebateoftenpitsphysicians—whosaythethreatoflawsuitspushesthemtoorderexpensive,unnecessaryt
Claysuggestsgoingthroughthein-boxessystematicallyandthoroughlyeverymorning,andlessoftenifnecessary.Morethan80
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
Normallyastudentmustattendacertainnumberofcoursesinordertograduate,andeachcoursewhichheattendsgiveshimacr
Youcanmakehealthymealsathomeifyouarewillingtodotheworkinvolvedinshoppingandcooking.Butpreparinghautecuisi
Therewasatimewhen,ifaladygotontoa【B1】______busortrain,agentlemanwouldimmediatelystandupandofferherhissea
随机试题
MCS-51系列单片机的一个机器周期包含时钟周期的个数是()
不能引起I型超敏反应的抗原是
血栓闭塞性脉管炎早期变化是
引进设备材料国内检验费费率一般为()。
某危险化学品罐区发生火灾事故。4座汽油罐和2座煤油罐被烧毁。根据《火灾分类》(GB/T4968),该起火灾为()。
从工程建设前期开始,包括建设期、使用期,直到工程报废拆除各阶段发生的成本都要进行控制,是指工程造价的()。
甲公司已进入稳定增长状态,固定股利增长率4%,股东必要报酬率10%。公司最近一期每股股利0.75元,预计下一年的股票价格是()元。
组织结构功能的大小,在很大程度上取决于()。
我们提倡干部在工作中走群众路线,你对干部走群众路线有什么看法?
某系统结构图如下图所示该系统结构图的深度是()。
最新回复
(
0
)