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
47
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] 【C13】
选项
A、earth
B、atmosphere
C、space
D、environment
答案
C
解析
词义辨析题。本句的意思是“射线对______ 中的探险者而言是已知的最严重的威胁”。再结合上文内容可知,C(太空)正确。
转载请注明原文地址:https://tihaiku.com/zcyy/2842523.html
相关试题推荐
Thewriter’sfirstmarriagewasunsuccessfulbecause______.[br]Thewriter’sm
Thewriter’sfirstmarriagewasunsuccessfulbecause______.[br]Whenthewrite
Allflights______becauseoftheheavyfog,wehadtodecidetotakethetrain.A
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofr
随机试题
NotesThemanwantedtoknowthe(9).T-shirts
PASSAGETWOAspect.score作名词有“得分”、“配乐”、“方面”、“宿怨”等意思。第2段末句提到了投资者担心VistaPrint的收入增长放缓
WherewillMr.BushtalkwithindustrializednationsonSouthAfricanissues?[o
人类自有文化就有文化交流。【T1】人类文化从整体来说是各国、各民族文化会聚、交流的产物。(takenasawhole)现代国际间的文化交流更是以空
AproverballegedlyfromancientChinawaswidelyspreadinthewest:"Ifyo
高速公路数字通信网中传输和交换信息的核心设备是()。A.计算机 B.数字交换设
(2021年真题)按照杜邦分析法将财务指标拆解成多项指标的乘积。关于杜邦分析法,
不能用活细胞荧光抗体染色法检测的是A.病毒B.淋巴细胞表面抗原C.免疫球蛋白受体
对流行性腮腺炎的护理,以下正确的是A.可以多进食饼干、薯片等调节食欲 B.严禁
关于工程量清单的编制,下列说法中正确的是()。A.项目编码以五级全国统一编
最新回复
(
0
)