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
1
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
Animalslivelongerwhentheircalorieintakeisrestrictedtotwo-thirdsofwha
Fishareanimalsthatliveinwater.Theyliveinalmostanyplace【B1】there
半硬质聚氯乙烯地板分为()。A.半硬质塑料地板砖和半硬质聚氯乙烯(PVC)地板
关于地籍管理信息系统,下列说法正确的有( )。A.地籍信息以空间数据和属性数据
尿道扩张术的禁忌证是A.排尿困难 B.尿道狭窄 C.急性炎症期 D.膀胱颈
美国一女患者,患有严重的脑综合征、慢性压疮(褥疮)、心脏病、糖尿病等,对环境没有
公司的盈利能力指标包括()。 Ⅰ.营业净利润 Ⅱ.营业毛利润 Ⅲ.资产净
具有保肝利胆作用的药物是A黄芩 B知母 C金银花 D黄连 E青蒿
属于“镇规划特点中技术特点”的是()。A.规划资料收集及调查对象相对集中,
下列关于水池满水试验的说法中正确的有()。A.向池内注水宜分两次进行,每次注水
最新回复
(
0
)