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
2024-05-05
39
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] 【B7】
选项
答案
explorers
解析
此空位于介词“to”之后,可知应填名词或名词性的成分;根据前面讲到的“太空服和宇宙飞船可以阻隔辐射以使在太空中的人免受其害”,不难听出这里的explorers,注意要用复数。
转载请注明原文地址:http://tihaiku.com/zcyy/3584731.html
相关试题推荐
Becauseshortmessagingserviceisakindofdatacommunication,secondgenerati
Becauseshortmessagingserviceisakindofdatacommunication,secondgenerati
Becauseshortmessagingserviceisakindofdatacommunication,secondgenerati
Becauseshortmessagingserviceisakindofdatacommunication,secondgenerati
______(此处严厉禁止拍照)becauseitmaydamagethoseworks.Takingphotosisstrictlyfo
[originaltext]Ilovetreesbecausetheyhavemanydifferentshadesofgreen
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecause
随机试题
•Readthetextbelowaboutanaccountant.•Choosethebestwordtofilleachg
"EngineeringClass"[img]2012q1/ct_etoefm_etoeflistz_1501_20121[/img][br]Whath
Richarddoesn’tthinkhecouldever______whatiscalled"free-style’poetry.A、
[originaltext]Ifanyoneaskedyouwhatwerethemainmeansofcommunication
Ineverycultivatedlanguagetherearetowgreatclassesofwordswhole,whento
在实证层面,科学精神的核心内涵是( )。A.实证精神 B.理性精神 C.分
某社区计划对高危人群进行健康风险评估,并提供健康促进与指导信息。请回答有关健康促
根据货币时间价值概念,货币终值的大小不取决于()。A:计息的方法 B:现值的大
二级耐火等级的厂房,其楼梯间墙的耐火极限不应低于()h。A.2.00 B.1
根据社会保险法律制度的规定,职工出现伤亡的下列情形中,应当认定为工伤的是(
最新回复
(
0
)