Space is a dangerous place, not only because of meteors 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 3 plants to make the food which we 4 .Heat, 5 , makes our environments tolerable and some ultraviolet rays penetrate the 6 .Cosmic 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 atmosphere they are 10 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 of radiation are measured in 14 calledrems .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 toswheresyou live, and this is a very rough estimate.Scientists have reason to think 18 a man can 19 far more radiation 20 without being damaged; the figure of 60 rems has been agreed.
1.A.for B.with C.on D.as
2.A.stars B.sun C.earth D.space
3.A.with B.from C.under D.for
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.valid 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.shown B.exposed C.faced D.covered
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.conventional B.commonC.general D.normal
17.A.shifts B.converts 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.from B.than C.as D.away
上一篇: 英语四级考试完形填空的模拟练习题(50)
下一篇: 英语四级考试完形填空的模拟练习题(49)
2017届高考英语一轮复习专题讲学案:专题06 非谓语动词(解析版)
梅兰妮·特朗普白宫肖像照惹争议 谁是最美美国第一夫人?
2017届高考英语一轮复习考点规范练:8 必修3 Unit 8(北师大版含解析)
2017届福建省高考英语一轮复习语法专题练:1 名词和冠词(新人教版含解析)
2017届高考英语一轮复习专题讲学案:专题05 介词与介词短语(解析版)
2017届高考英语一轮复习考点规范练:1 必修1 Unit 1(北师大版含解析)
坚持的力量 The Power of Persistence
2017届高考英语一轮复习专题讲学案:专题01 名词与冠词(解析版)
2017届高考英语一轮复习专题讲学案:专题11 定语从句(解析版)
年轻人少熬夜 早睡的人更聪明!
2017届高考英语一轮复习专题讲学案:专题16 书面表达(解析版)
2017届高考英语一轮复习考点规范练:2 必修1 Unit 2(北师大版含解析)
2017届高考英语一轮复习专题讲学案:专题04 动词及动词短语(解析版)
马云透露阿里成功的秘诀 那就是女性员工多!
报告显示 我国涌现131家独角兽企业
最新研究表明 一夫一妻制未必最合理
2017届高考英语一轮复习考点规范练:6 必修2 Unit 6(北师大版含解析)
2017届福建省高考英语一轮复习语法专题练:2 代词(新人教版含解析)
2017届高考英语一轮复习专题讲学案:专题07 情态动词和虚拟语气(解析版)
2017届高考英语一轮复习考点规范练:5 必修2 Unit 5(北师大版含解析)
2017届高考英语一轮复习专题讲学案:专题03 形容词和副词(解析版)
一周热词榜(3.25-31)[1]-31)
最后的几天 The Last Few Days
如何毫不费力的拥有健康饮食?
2017届福建省高考英语一轮复习语法专题练:3 介词和介词短语(新人教版含解析)
研究已表明:写下自己的情绪有利于减少压力和焦虑
2017届高考英语一轮复习专题讲学案:专题13 情景交际(解析版)
I was in the fifth grade when I first dipped my fingers into the endless完形填空答案
少年在联合国发表演讲 A Teenager Delivered a Speech in UN
2017届高考英语一轮复习专题讲学案:专题08 动词的时态和语态(解析版)