首页
登录
职称英语
Space is a dangerous place, not only because of meteors(流星)but also because
Space is a dangerous place, not only because of meteors(流星)but also because
游客
2023-07-16
17
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(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. [br] 【C1】
选项
A、for
B、with
C、on
D、as
答案
D
解析
惯用搭配题。act与with通常不构成搭配,而act for意为“代表,代理”,act on意为“按照”,act as意为“充当,起…作用”,只有act as符合句意,在句中意为“大气层起到保护毯的作用”,所以D正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2842511.html
相关试题推荐
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext]W:Whydidn’tyouhaveyourphysicsclasstoday?M:Becauseonly
[originaltext](32)Manyanimalsrecognizetheirfoodbecausetheyseeit.So
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
Becausesomanypeopleintheirteensandearly20sareincreasinglysociali
随机试题
PerhapslikemostAmericansyouhavesomeextrapoundstoshed.Youmayeven
设计概算的编制,通常是从哪一级开始的?( )A.建设项目总概算 B.单项工程
硬路肩的顶面高程低于相连的行车道,这种情况应先摊铺硬路肩部分,宽度应比要求的宽(
根据随机抽样调查资料,某企业工人生产定额平均完成103%,标准误为1%,置信度为
装饰装修分部工程验收时,可不参加验收的单位是()。A、设计单位 B、建设单位
二手房销售的特点包括()。A:产权关系复杂 B:标的物分散 C:价格浮动空
党的十九大作出了“中国特色社会主义进入了新时代”的重大政治论断。中国特色社会主义
有的学生愿意为他所喜欢的老师努力学习,而面对不喜欢的老师则不愿意努力学习。此时影
建立行政诉讼制度,保障公民、法人和其他组织最终能够通过诉讼的途径来维护自己的合法
下列关于劣药的说法不正确的是( )。A.药品成分的含量不符合国家标准的为劣药
最新回复
(
0
)