首页
登录
职称英语
Space is a dangerous place, not only because of meteors (流星) but also becaus
Space is a dangerous place, not only because of meteors (流星) but also becaus
游客
2023-07-14
44
管理
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. [br] 【C1】
选项
A、for
B、with
C、on
D、as
答案
D
解析
act as“充当、起……作用”;act for“代表、代理”;act on“按照”。本句意为“大气层为地球起到保护伞作用。”
转载请注明原文地址:https://tihaiku.com/zcyy/2835120.html
相关试题推荐
Jasondideverythinginhis______tocomforthisgirlfriendbecauseofherfailu
【B1】[br]【B8】A、evenB、becauseC、ifD、althoughD
[originaltext]Whenpeoplesucceed,itisbecauseofhardwork,butluckhas
[originaltext]Whenpeoplesucceed,itisbecauseofhardwork,butluckhas
[originaltext]Whenpeoplesucceed,itisbecauseofhardwork,butluckhas
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
[originaltext]M:Thenwhydidyouapplyforthisjob?W:That’sbecauseofthe
随机试题
Whatisthemainpurposeofthelecture?[br]Whydoestheprofessortalkabout
Toguideyouthroughthepractice,let’sstartwiththebasicquestionsabou
Burmeseopposition’sleaderAungSanSuuKyihasvowedtocontinueseekingfreed
LandingaJoboftheFutureTakesaTwo-trackMindIfyou’regea
文化的特征是什么?
某城市桥梁工程为钻孔灌注桩,承台为大体积混凝土。为避免发生质量事故,施工单位编制
防治污染设施的建设工程项目,其防治污染的设施必须经( )验收合格后,该项目方可
炉贝药材的原植物是A:川贝母B:暗紫贝母C:甘肃贝母D:梭砂贝母E:新疆
下列溶剂属于非极性溶剂的是A:乙醇 B:丙二醇 C:二甲基亚砜 D:植物油
某工程单代号搭接网络计划中工作B、D、E之间的搭接关系和时间参数如下图所示。工作
最新回复
(
0
)