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
68
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
Withoutimmediateaction,manykindsofwildanimalswoulddiefromhunger.A、如果立
WhatdowelearnaboutNCLB?[originaltext]M:Goodevening.TodaywehaveDr.Di
[originaltext]M:HiMelissa!Welcomeback!DidyouhaveagoodtimeinPeru?W:
Strongemotionalbondsbetweenmothersandinfantsincreasechildren’swilli
招标公告应当载明招标( )。A.招标机构名称及地址 B.招标开始时间与投标截
甲状腺功能减退病人可见的面容为()A.无欲貌 B.苦笑面容 C.面具面
导致肾病综合征复发和疗效不佳的主要原因是()。A.感染 B.急性肾衰竭 C
肾盂肾炎患者尿路感染最常见的致病菌为A.肠球菌 B.克雷伯杆菌 C.大肠埃希
对于出租经营或自营的房地产投资项目,清偿能力指标之中的()指标的计算非常重要。
全口义齿重衬的目的是A.取压力印模 B.升高垂直距离 C.使义齿组织面与组织
最新回复
(
0
)