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
2023-07-18
63
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] 【C13】
选项
A、earth
B、atmosphere
C、space
D、environment
答案
C
解析
由radiation和explorers司推测,应选space(太空)。本句意为射线是探险者在太空遇见的已知的最大危险。
转载请注明原文地址:https://tihaiku.com/zcyy/2848301.html
相关试题推荐
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseof
Spaceisdangerousplace,notonlybecauseofmeteors(流星)butalsobecauseof
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Itiseasiertonegotiateinitialsalaryrequirementbecauseonceyouarein
Theyalsofinditdifficulttobepleasedbycomplimentsbecausetheybelieveth
A、Becausetheyarerealizingtheimportanceofforeignlanguageintheirfuture
A、Becauseshedidnotlikethelifeofthesouth.B、Becauseshewasborninthe
A、BecauseitisthelargestairportinAmerica.B、Becauseithasagoodsorting
A、Becausethequalityofwaterdecidesitsvolume.B、Becausehealthconditionsa
A、Studentsattenditbecauseitisrequired.B、Thestudentlikesthecoursevery
随机试题
[originaltext]M:CaitlinFriedmanoffersadviceonbeingasmartwoman-in-charg
[originaltext]W:Peterhasbeenworkingfivepart-timejobssincehestartedco
某旅游景点纪念品商店出售秦始皇兵马俑的复制品,标签名为“秦始皇兵马俑”,标价为
下列外科感染的特点中,错误的是A.主要应用抗生素治疗 B.多为器质性病变 C
病人甲输液中发生反应,经对症处置,症状消失,当天夜里出现心悸,呼吸困难,晨5时死
(一)开始部分 1.课堂常规:体委整队,报告人数,师生问好,教师简要介绍教学内容,检查服装,安排见习生。 导入:同学们前面我们已经对篮球行进间低手投篮进
现在血小板计数的参考方法是A:血细胞计数板法B:单通道电阻抗计数法C:流式细
马克思主义认为,法是人类社会发展到一定历史阶段才出现的社会现象。下列说法中,哪些
可能导致药品不良反应的饮食原因是A.饮茶 B.饮酒 C.饮水 D.高组胺食
根据标准施工招标文件,下列合同事件中承包人只能索赔工期和费用的是()。A.施工过
最新回复
(
0
)