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
2023-10-26
10
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 earth. Light gets through, and this is 【C2】_____ for plants to make the food 【C3】_____ we eat. Heat, too, makes our environment endurable. Various kinds of rays 【C4】_____ the air from outer space, 【C5】_____ enormous quantities of radiation from the sun are 【C6】_____ off. As soon as men leave the atmosphere they are 【C7】_____to this radiation but their spacesuits or the walls of their spacecraft, 【C8】_____ they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known 【C9】_____ to explorers in space. The unit of radiation is called "rem (雷姆)". Scientists have reason to think that a man can 【C10】_____ far more radiation 【C11】_____ 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely 【C12】_____ to be sure about radiation damage—a person may feel perfectly well, but the 【C13】_____ of his or her sex organs may be damaged, and this will not be discovered 【C14】_____ the birth of deformed children or even grandchildren.
Missions of the Apollo flights have had to cross belts of high amount of rems. So far, no dangerous amounts of radiation have been 【C15】_____, but the Apollo missions have been quite 【C16】_____. We simply do not know yet how men are going to get on when they 【C17】_____ weeks and months outside the 【C18】_____ of the atmosphere, working in a space laboratory. Drugs might help to 【C19】_____ the damage done by radiation, but no really 【C20】_____ ones have been found so far. [br] 【C18】
选项
A、profession
B、production
C、protection
D、prevention
答案
C
解析
考查形近名词辨析。profession“职业”,production“产量,生产”,protection“保护,保卫”,prevention“防止,预防”。由下文提到的“在太空实验室工作”,结合首段提到的“大气层……起到了地球保护毯的作用”,可知protection符合句意,故选C。
转载请注明原文地址:https://tihaiku.com/zcyy/3130850.html
相关试题推荐
PASSAGETHREE[br]WhycanMcDonald’sfoodcauseheartdisease?Becauseitwillm
PASSAGEONE[br]WhydidHippiesgiveflowerstopeople?Becausetheywantedtoc
Susandecidednottowriteherresignationintheofficebecauseshedidn’twant
Muchas_______,Icouldn’taccompanyhimtotheconcertbecauseIsimplydidn’t
Thefootballmatchwas_______becauseoftheheavyrain.A、calledoffB、calledup
Thelocalslikesellingthingstotouristsbecausethetouristsareso______.A、
I’dratheryou_______bytrainbecausetheweatherforecastsaidtherewouldbe
He______havebeennervousbecausehedidn’tgostraightin.A、oughttoB、mustC、
A、Becauseshewantstokeepitasasouvenir.B、Becauseshewantstoknowthelo
A、BecauseShakespeareanEnglishisclosertomodernEnglish.B、BecauseShakespea
随机试题
[originaltext]Chinesecuisineisnotedforthefollowingcharacteristics:(16)V
[originaltext]W:Hi,David.(12)There’sanewgymopeningintowntoday.Would
根据《中华人民共和国建筑法》符合建筑工程分包单位分包条件的是()。A.总包单
下列不符合《证券公司另类投资子公司管理规范》的是()。 ①甲证券公司设立2
李某患系统性红斑狼疮,肾活检表明该病例处于活动期,发展较快。另外该患者还有谷丙转
患者,65岁。以呼吸困难、发绀、恐惧、烦躁不安而急诊入院,诊断为:心脏病合并心力
患者,男,76岁,自诉胸闷,呼吸不畅,不能平卧。观察发现患者呼气时间长于吸气时间
(2016年真题)美国食品药品监督管理局(FDA)根据药品对胎儿的危害,将妊娠用
根据《建设工程工程量清单计价规范》,分部分项工程综合单价构成应包括A、直接工程费
输油管线工程建设过程中,减少工程施工对植被影响的重要措施是( )。A.加快施工
最新回复
(
0
)