首页
登录
职称英语
Space is a dangerous place, not only because of meteors(流星)but also because of r
Space is a dangerous place, not only because of meteors(流星)but also because of r
游客
2024-02-19
38
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.【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 "rem(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 two milligrams; 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/3464569.html
相关试题推荐
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseof
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Theyalsofinditdifficulttobepleasedbycomplimentsbecausetheybelieveth
A、Becausetheyarerealizingtheimportanceofforeignlanguageintheirfuture
A、Becauseshedidnotlikethelifeofthesouth.B、Becauseshewasborninthe
A、BecauseitisthelargestairportinAmerica.B、Becauseithasagoodsorting
Becausetheywereforeigners,thetourists______(被拒绝进入)themilitaryexhibitio
随机试题
PartⅡReadingComprehension(SkimmingandScanning)Directions:Inthispartyo
Inlastyear’sSciencestudy,researchersatJohnsHopkinsUniversityexami
短期借款利息支出计入()。A.其他支出 B.事业支出 C.经营支出
在评标过程中,()是不符合招标投标法要求的A.评标委员会委员由5人组成,其中
教师引导学生梳理古代诗词中的“梧桐”意象,体悟其多样的内涵,下列“梧桐”意象与爱
后溪穴是手太阳小肠经的A.荥穴 B.输穴 C.经穴 D.络穴 E.郄穴
冲脉的功能是A.调节全身阴经经气 B.涵蓄十二经气血 C.调节六阴经经
养血安神丸治疗A.阴虚血少所致失眠 B.心血不足所致失眠 C.肝郁气滞所致失
下列说法错误的是()。A.保险具有"一人为众,众为一人"的特性 B
不属于思维内容障得的是 A.思维散漫 B.被监视感 C.被洞悉感
最新回复
(
0
)