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
42
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] 【C13】
选项
A、functions
B、structures
C、operations
D、cells
答案
D
解析
考查名词辨析和上下文语义逻辑。根据下文deformed一词可推断此处应该是细胞受到损伤,才会导致生下畸形的子女或者孙子女,cells符合句意,故选D。function“功能”,structure“结构”,operation“运行”,均不及cells与deformed的关系密切。故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/3130845.html
相关试题推荐
BecauseJackhadbasedhisargumentuponafaulty______,hisopponentcheerfull
Agreencampusiswhatmostpeopledesirefor,becausegoodcampusenvironme
Ourjourneywasslowbecausethetrainstopped______atdifferentvillages.A、un
Becauseoftheeconomiccrisis,industrialoutputintheregionremained_____.(2
"Lookatthoseprettygirls’skirts"is______,becauseitisnotclearwhethert
Alotoffarmingtechniqueshavebeenabandonedbecausetheyweretoolabor-____
Thegovernmenttriedto______thebookbecauseoftheinformationitcontainedab
Fromthe_____itwasclearthathewasguilty,becausehedidappearonthescene
_____,heisalwaysmodest.A、WithallhisprofoundknowledgeB、Becauseofallhi
Heistheonlypersonwhocan______inthiscase,becausetheotherwitnessesw
随机试题
[originaltext]LiHua:Pardonme.I’mtryingtofindarticlesonecology.Canyo
[originaltext]TheAmericanpatentsystem,providedforintheConstitution,
固定义齿修复中,倾斜度在多少范围内的牙齿仍可以选作基牙A.6° B.45°
基金销售机构应当建立基金销售适用性管理制度,至少包括的内容有()。 Ⅰ.对基
心电图对鉴别心肌梗死和心绞痛最有意义的改变是A.ST段弓背向上抬高 B.T波呈
SF6断路器瓷套或绝缘子有开裂、放电声或严重电晕定性为严重缺陷。
我们日常生活中的手机,车载导航系统等经常用到的GPS,请问GPS的全称是:()
掌握学习
股份有限公司董事、监事、高级管理人员在任职期间每年转让的股份不得超过其所持有本公
处方开具当日有效。特殊情况下可以延长有效期。但有效期最长不得超过A.2天 B.
最新回复
(
0
)