首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphe
Space is a dangerous place, not only because of meteors (流星) but also because of rays from the sun and other stars. The atmosphe
admin
2014-04-23
51
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 as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.
Radiation is the greatest known danger to explorers in space. The unit of radiation is called "rem". Scientists have reason to think that a man can put up with far more radiation than 0. 1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage—a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.
It can be inferred from the passage that______.
选项
A、the Apollo mission was very successful
B、protection from space radiation is no easy job
C、astronauts will have deformed children or grandchildren
D、radiation is not a threat to well-protected space explorers
答案
B
解析
本题是一道暗示推断题。问从文章中我们可以推断出什么。通读全文,我们知道作者主要在讲述太阳和其他星体的辐射会给人体带来伤害,但是辐射对人体的伤害程度很难确定,需要很长的时间才能显现出来,从而可以推断出防止受到辐射的伤害不是一件轻而易举的事情。因此,本题的正确答案应是B。
转载请注明原文地址:https://kaotiyun.com/show/27XO777K
0
在职攻硕英语联考
相关试题推荐
Youareaccident_________becauseyou’reabitcarelessinwhatyoudo.
Peopleofallcountriesareexpectedto______theprinciplesoftheUnitedNationsanddefendthepeaceintheworld.
Forlaymenethnologyisprobablythemostinterestingofthebiologicalsciencesfortheveryreasonthatitconcernsanimalsin
Currentdatasuggestthat,although______statesbetweenfearandaggressionexist,fearandaggressionareasdistinctphysiolo
ThehistoryofresponsestotheworkoftheartistSandroBotticelli(1444—1510)suggeststhatwidespreadappreciationbycritics
Alineinasongasks,"Doesanyonereallyknowwhattimeitis?"Thisquestioncouldeasilyapplytocalendars!Didyouknowth
Thisorganizationisalsoamanufacturingfirm.Here,however,managementencouragesandrewardsrisktakingandchange.Decisio
Althoughofcoursethereareexceptions,itseemsreasonablyclearthatincertaincountries—Rwanda,Somaliaandpartsofthefo
Fromthehealthpointofviewwearelivinginamarvelousage.Weareimmunizedfrombirthagainstmanyofthemostdangerousd
Inthispart,youaretowriteacompositionofnolessthan120wordsabout"CollegeGraduatesWorkasVillageOfficials".You
随机试题
患者,男,18岁。卒发腹痛,拒按恶食,嗳腐吞酸,腹痛泻后痛减,舌苔厚,脉滑实有力。应诊为
国际技术贸易是()。
与生产建设性财政相比,公共财政的基本特征包括()。
有125个棱长均为1的正方体,其中100个表面为白色,25个表面为蓝色。将这些正方体组成一个大正方体,表面为白色的面积至少为()。
从本质上看,国际信用是()的一种形式。
党的十九大报告对新时代党的建设总要求是“坚持党要管党、全面从严治党”,再一次彰显出“全面从严治党”的决心。继续推进新时代全面从严治党,要深刻把握其中的四个关系:把握思想建党和制度治党的关系,把握党内法规同国家法律的关系,把握党内监督和社会监督的关系,把握岗
借助现代化科学手段,信息一秒钟可以到达月球,可以绕地球七圈半,等发现了错误再纠正,收到信息者可能已经关闭了收音机。未来社会的信息过剩,一如生产过剩带来经济危机一样,很可能是人类进步所付出的必然代价;信息过剩和信息的快速传播将导致信息的贬值。文段主要
SaunaCeremonialbathinghasexistedforthousandsofyearsandhasmanyforms,oneofwhichisthesauna.TheFinnshavepe
TheUnitedStates【C1】______alargepartoftheNorthAmericancontinent.ItsneighborsareCanada【C2】______thenorth,【C3】______M
DiscussionoftheassimilationofPuertoRicansintheUnitedStateshasfocusedontwofactors:socialstandingandthelossof
最新回复
(
0
)