完形填空 Space is a dangerous place,not only because of meteorsbut also because of rays from the sun and other stars．The atmosphere again acts 1 our protective blanket on 2 ．Light gets through,and this 题目和参考答案——青夏教育精英家教网—

题目内容

完形填空

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 　　1　　 our protective blanket on 　　2　　．Light gets through,and this is essential for 　　3　　 to make the food which we 　　4　　．Heat, 　　5　　, makes our environments tolerable and some ultraviolet rays penetrate(穿透)the 　　6　　．Cosmic(宇宙的)rays of various kinds come 　　7　　 the air from outer space,but 　　8　　 quantities of radiation from the sun are screened off．　　9　　 men leave the 　　10　　 they are exposed to this radiation; 　　11　　 their spacesuits or the walls of their spacecraft,if they are inside, 　　12　　 prevent a lot of radiation damage．Radiation is the greatest known danger to explorers in 　　13　　．Doses(剂量)of radiation are measured in 　　14　　 called “rems(雷姆)”．We all 　　15　　 radiation here on earth from the sun,from cosmic rays and from radioactive minerals．The “　　16　　” dose of radiation that we receive each year is about two millirems;it 　　17　　 according to where you live,and this is a very rough estimate．Scientists have reason to think 　　18　　 a man can 　　19　　 more radiation without being damaged;the figure of 60 rems has been 　　20　　．

(1)


[　　]
A．	for
B．	with
C．	on
D．	as

(2)


[　　]
A．	stars
B．	sun
C．	earth
D．	space

(3)


[　　]
A．	people
B．	factories
C．	farmers
D．	plants

(4)


[　　]
A．	use
B．	live
C．	eat
D．	get

(5)


[　　]
A．	again
B．	also
C．	besides
D．	too

(6)


[　　]
A．	environment
B．	space
C．	atmosphere
D．	earth

(7)


[　　]
A．	across
B．	to
C．	from
D．	through

(8)


[　　]
A．	extreme
B．	enormous
C．	various
D．	proper

(9)


[　　]
A．	As soon as
B．	As well as
C．	As much as
D．	As possible as

(10)


[　　]
A．	earth
B．	atmosphere
C．	houses
D．	shelter

(11)


[　　]
A．	but
B．	because
C．	so
D．	so that

(12)


[　　]
A．	get
B．	make
C．	have
D．	do

(13)


[　　]
A．	earth
B．	atmosphere
C．	space
D．	environment

(14)


[　　]
A．	pieces
B．	units
C．	parts
D．	elements

(15)


[　　]
A．	receive
B．	accept
C．	bring
D．	catch

(16)


[　　]
A．	total
B．	common
C．	general
D．	normal

(17)


[　　]
A．	shifts
B．	changes
C．	modifies
D．	varies

(18)


[　　]
A．	what
B．	which
C．	that
D．	why

(19)


[　　]
A．	put up with
B．	keep up with
C．	come up with
D．	catch up with

(20)


[　　]
A．	found
B．	pointed
C．	agreed
D．	described

答案：1．D;2．C;3．D;4．C;5．D;6．C;7．D;8．B;9．A;10．B;11．A;12．D;13．C;14．B;15．A;16．D;17．D;18．C;19．A;20．C;
解析：

(1)	act as意为“充当、起……作用”，act for意为“代表、代理”，act on意为“按照”，本句意为“大气层起到保护伞的作用”。
(2)	显然，是对地球的保护。
(3)	利用光来制造食物是植物的本能。
(4)	只有eat与先行词food和定语从句“which we……”搭配。
(5)	本句意为“热不仅使我们的生存环境温度适宜，而且紫外线也能穿透大气”。also一般紧跟动词；besides一般用在句前，too可用在句中，用逗号隔开。
(6)	根据上题所讲，penetrate这个动词后面应接atmosphere(大气)这个名词。
(7)	这里的come through相当于penetrate(穿透)。come across意为“偶遇”，come to意为“来到”，come from意为“来自”。本句意为“各类来自外部空间的宇宙射线穿透大气层……”，故选come through。
(8)	extreme意为“极端的”，various意为“各种各样的”，proper意为“合适的”。在四个选项中只有enormous表示“大量的”。
(9)	as soon as意为“一旦；一……就……”，as well as意为“除……之外”，as much as意为“和……一样多”，as possible as意为“尽可能的”。
(10)	前面说了大气层(atmosphere)对人类的保护主要是挡住对人体有害的辐射，因此，一旦离开大气层的保护，人就会暴露在辐射中。
(11)	本句前半句的意思是“人们一离开大气层就会接触射线”，后半句意思是“他们的太空服和太空船会阻止射线造成的损害”。前后应该是转折关系，故用but。
(12)	“do＋动词原形”结构表示强调谓语动词。注意if they are inside是插入语，prevent是谓语动词。
(13)	由radiation和explorers可推测，应选space(太空)。本句意为“射线是探险者在太空可遭遇的已知的最大危险”。
(14)	unit意为“单位、单元”，element意为“元素”，part意为“部分”，piece意为“碎片”。本句意为“射线的多少可以用雷姆这个测量单位测量”。
(15)	receive表示客观收到；accept表示主观接受。我们受到的辐射并非主观接受。
(16)	total意为“总量”。从下一句话可知，不同的人在全年中受到的辐射量是不同的，所以不可能有总量；common意为“共同的、普通的”；general意为“一般的、总体的”；normal意为“正常的”。本句意为“我们每年接受的正常辐射量……”，故选normal。
(17)	shift意为“移动、转换”，convert意为“转换”，modify意为“修改”，vary意为“变化”。根据句意，所处地点不同，所受辐射量也不一样……，故选varies。
(18)	本句应填入引导宾语从句的代词，而从句不缺少主语和宾语，因而不选择what和which，又加之主句是陈述语气，故选that。
(19)	put up with意为“忍受”，固定搭配。keep up with和catch up with意为“赶上、跟上”，come up with意为“提出”。
(20)	科学家认为人类在现有的辐射量基础上还可以再多承受些，而60雷姆的量是个科学家们普遍认为适合的量，因此要用agreed。

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37. A. for                          B. at                                   C.of                          D. in
38. A. take                B. bring             C. make                    D. use
39. A. such                B. few                  C. so                      D. little
40. A. full                B. limited              C. extra              D. enough
41. A. exchange                         B. variety                             C. change                           D. difference
42. A. are                      B. is                                       C. being                               D. be
43. A. to                                        B. with                                 C. at                                               D. from
44. A. sold                                    B. served                             C. made                               D. kept
45. A. which                                 B. it                                       C. except                             D. instead
46. A. or                 B. but               C. and               D. except
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48. A. along                                  B. with                                 C. about                               D. at
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25. A. by B. over C. in D. through

26. A. ground B. bottom C. floor D. surface

27. A. taken in B. sent out C. admitted to D. taken out

28. A. However B. Yet C. Afterwards D. Therefore

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30. A. leads to B. gives off C. results from D. joins hands

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33. A. so B. instead C. thus D. but

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35. A. in B. on C. over D. at

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38. A. pressure B. surface C. climate D. appearance

39. A. from B. into C. in D. on

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5.A. eventually B. usually C. immediately D. always

6.A. recognized B. joined C. contacted D. congratulated

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