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
14
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] 【C17】
选项
A、shifts
B、converts
C、modifies
D、varies
答案
D
解析
shift“移动”;convert“转换”;modify“修改”;vary“变化”。根据句意,所处地点不同,所受辐射量也不一样,故选varies。
转载请注明原文地址:https://tihaiku.com/zcyy/3451402.html
相关试题推荐
Mr.WhiteandMrs.Whitehaveto____________________(缩短蜜月)becausethesecretar
Don’thesitatetodoitbecausewhatyoudo____________(对我没有很大关系).doesnotmak
The__________oftherelieftothefloodedareawasheldupbecauseoftheincon
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
随机试题
Mostearthquakesoccurwithintheupper15milesoftheearth’ssurface.But
[originaltext]Sportsmadgamesareveryusefulforcharactertraining.Int
以下属于二级耐火等级建筑的是()。A.60m的住宅 B.36m的住宅
低合金高强度结构钢是在碳素钢的基础上加入一定量的合金成分而成,其中合金成分占总量
阅读以下说明,回答问题1至问题4,将解答填入答题纸对应的解答栏内。 【说明】
超前地质预报按预报长度划分为()。A:特长距离预报:预报200m以上 B:长
患者,7岁。咳嗽一个月,咳痰少量,午后体温37.6℃。伴乏力,多汗,食欲不振。查
以下哪部是我国古代的地理学巨著()。A.《太平广记》 B.《梦溪笔谈》 C.
A.肾上腺素 B.甲氧氯普胺 C.阿托品 D.熊去氧胆酸 E.地芬诺酯促
设配对设计资料的变量值为χ1和χ2,则配对资料的秩和检验:A.把X1和X2的差数
最新回复
(
0
)