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
2023-08-29
50
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【B1】______ again acts as our protective blanket on earth. Light gets through, and this is【B2】______ for plants to make the food which we eat. Heat, too, makes our environment【B3】______. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are【B4】______ off. As soon as men leave the atmosphere they are exposed to this【B5】______ and their spacesuits or the walls of their spacecraft, if they are inside, do【B6】______ a lot of radiation damage.
Radiation is the greatest known danger to【B7】______ 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 【B8】______ difficult to be sure about radiation damage—【B9】______, and this will not be discovered until the birth of deformed children or even grandchildren. Missions of the Apollo flights have had to cross belts of high amounts of rems.【B10】______,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,【B11】______ [br] 【B9】
选项
答案
a person may feel perfectly well,but the cells of his or her sex organs may be damaged
解析
根据前后文的大意,不难知道这里说的是辐射损害的隐秘性。浏览后面一句,可推知辐射会对人的生殖系统等方面造成损害,所以听音时不难抓住关键词。
转载请注明原文地址:http://tihaiku.com/zcyy/2968469.html
相关试题推荐
Accordingtothepassage,scholarsandstudentsaregreattravelersbecause____
Becausetheotherwitnesseswerekilledmysteriously,he______(成了这个案件中唯一的证人).bec
______(这名运动员被剥夺掉金牌)becausehewasfoundtohavetakenforbiddendrugs.Theathle
[audioFiles]audio_eusm_0207(20106)[/audioFiles]A、Theyaredelightedbecausethe
Thisisagoodchancefortheseartists______(因为他们的个人主义最终在作品中表现了).as/becauseth
Theauthorofthereport_______________________(对医院的问题非常了解)becausehehasbee
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
BecauseSouthAfricansaregenerallysobubbly(热情奔放的)andtalkative,silenc
随机试题
WhatchangeshappenedattheAcademyAwards?[br][originaltext]Thisyear,
Avoideggs.Drink8glassesofwateraday.Eatingcarbswill【C1】______.Nut
TheU.N.InternationalAtomicEnergyAgency______[originaltext]TheU.N.I
Fewpeopleexpectluxurywhileflying,butthesedays,【T1】________.It’snot
[originaltext]M:Excuseme.MayIhavesomeinformationaboutthereceptionpar
开口于舌下襞的腺体是()A.下颌下腺 B.舌下腺 C.腮腺 D.
强心苷治疗心力衰竭的主要适应证是A.严重贫血诱发的心力衰竭 B.由瓣膜病、高血
有关毒性反应的叙述,错误的是A.危害多较严重 B.包括慢性毒性反应和急性毒性反
房地产不仅在租赁、抵押、征收、分割、损害赔偿、税收、保险等活动需要估价,房地产估
施工成本计划的编制以成本预测为基础,关键是确定()。A.目标成本 B.预
最新回复
(
0
)