第二节:完形填空(共20小题;每小题2分,满分40分)
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 36 our protective blanket on 37 .Light gets through, and this is essential 38 plants to make the food which we 39 .Heat, 40 , makes our environments tolerable and some ultraviolet rays(紫外线的) penetrate(穿过)the 41 .Cosmic(宇宙的) rays of various kinds come 42 the air from outer space, but 43 quantities of radiation from the sun are screened off. 44 men leave the atmosphere they are 45 to this radiation; 46 their spacesuits or the walls of their spacecraft, if they are inside, 47 prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in 48 .Doses of radiation are measured in 49 called “rems ( 雷姆)”.We all 50 radiation here on earth from the sun, from cosmic rays and from radioactive minerals. The“ 51 ”dose of radiation that we receive each year is about two millirems; it 52 according to where you live, and this is a very rough estimate. Scientists have reason to think 53 a man can 54 far more radiation 55 without being damaged; the figure of 60 rems has been agreed.
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36.A.for |
B. with |
C. on |
D. as |
|
37.A.stars |
B. sun |
C. earth |
D. space |
|
38.A.with |
B. from |
C. under |
D. for |
|
39.A.use |
B. live |
C. eat |
D. get |
|
40.A.again |
B. also |
C. besides |
D. too |
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41.A.environment |
B. space |
C. atmosphere |
D. earth |
|
42.A.across |
B. to |
C. from |
D. through |
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43.A.so |
B. enormous |
C. various |
D. proper |
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44.A.As
soon as |
B. As
well as |
C. As
much as |
D.As possible as |
|
45.A.shown |
B. exposed |
C. faced |
D.covered |
|
46.A.but |
B. because |
C. so |
D.so that |
|
47.A.get |
B. make |
C. have |
D.do |
|
48.A.earth |
B.atmosphere |
C.space |
D.environment |
|
49.A.pieces |
B.units |
C.parts |
D.elements |
|
50.A.receive |
B.accept |
C.bring |
D.catch |
|
51.A.unusual |
on |
C.general |
D.normal |
|
52.A.shifts |
verts |
C.modifies |
D.varies |
|
53.A.what |
B.which |
C.that |
D.why |
|
54.A.put
up with |
B.keep up with |
e up with |
D.catch up with |
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55.A.from |
B.than |
C.as |
D.away |