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
2024-02-14
13
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] 【C3】
选项
A、with
B、from
C、under
D、for
答案
D
解析
be essential for“对……来说是重要的、基础的”,固定搭配。
转载请注明原文地址:https://tihaiku.com/zcyy/3451388.html
相关试题推荐
【B1】[br]【B10】A、BecauseB、ThoughC、WhetherD、IfD结构衔接题。这句的意思是“如果选不到这些课程的话,还会有许多
[audioFiles]audio_eufm_j75_001(20082)[/audioFiles]A、Becausethepolicemanstopp
Don’thesitatetodoitbecausewhatyoudo____________(对我没有很大关系).doesnotmak
Hewasarrestedbythepolicebecausehe__________(对这场交通事故负有责任)wasresponsiblef
Skydiving,adifficultanddangeroussport,isverypopular______bothmenand
Icouldn’tsleeplastnightbecausethetapinthebathroomwas______.A、draining
They____________(被拒绝进入)themilitaryexhibitionbecausetheywereforeigners.
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
随机试题
商业银行保持合理的资产负债分布结构有助于降低流动性风险,下列做法恰当的有(
下述哪种甲状腺癌的分化最差A、滤泡状腺癌 B、巨细胞癌 C、髓样癌 D、乳
Inthecollege-admissionswars,weparen
A.上荣头目B.通过三焦,流行全身C.熏于肓膜,散于胸腹D.上走息道,下注气街E
断路器例行巡视的内容不包括()外观清洁、无异物、无异常声响。$;$油断路器
当前,电子产品的使用成为一种大趋势,很多儿童青少年习惯于在网上学习和娱乐,近视防
亚音速流动,当断面逐渐减小,正确的描述是( )。A.速度减小 B.速度不变
某书店购回甲、乙两种定价相同的书,其中甲种书占60%,需按定价的78%付款给批发
承保时不出立保险单的人身意外伤害保险是()。A.公路旅客人身意外伤害保险 B
下列设备基础需要做预压强度试验的是()。A.电机 B.压缩机 C.泵
最新回复
(
0
)