(答案解析)
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一、单项选择题。
1.Astronomers and scientists think that a black hole is a region of space (not a thing) ______ which matter has fallen and ______ which nothing can escape - not even light.
A. into , into B. into , from C. from , into D. from, from
2.This process of shrinking may be so
intense ______ a black hole results.
A. as B. that C. what D. if
3.Binary stars, ______ their name suggests, are twin stars whose position in space affects each other.
A. as B. that C. what D. if
4.In some binary systems, astronomers have shown that there is an
invisiblecompanion star, a
partner to _______ which can see in the sky .
A. the one B. that C. the ones D. those
5.On the other hand, scientists have suggested that very
advanced technology could one day ____the
energy of black holes for mankind.
A. make fun of B. make sure of C. make use of D. make sense of
6.Astronomers have evidence of a few other stars too, which might have black holes as _____.
A. companies B. comparisons C. compounds D.
companions
7.The earth is one of nine
planets which move in ______ round the sun.
A. track B. orbit C. tour D. route
8.In August 1977, a
satellite was ______ to gather data about the black holes in the Milky way.
A. posted B. delivered C. launched D. transmitted
9.The terms we would
normally use to describe a
scientificphenomenon are ______ here.
A. inadequate B.
invisible C.
intense D. individual
10.We know nothing about events which happen once objects pass this
boundary. But ______, matter must
behave very
differently inside the hole.
A. in
addition B. in person C. in detail D. in theory
二、综合题。
1. Word form
1. Let us consider the earth as a
planet _______(revolve) round the sun.
2. Scientists have suggested that very ________(advance) technology could one day make use of the
energy of black holes for mankind.
3. The most _______(convince) evidence of black holes comes from
research into binary stars systems.
4. There might be a
massive black hole at the center of our galaxy ______(swallow) up stars at a very rapid rate.
5. The
audience ______(be ) returning to their seats at that time.
6. My friend and classmate Paul often ______(race) motorcycles in his spare time.
7. Astronomers are planning a new
observatory to study the individual exploding stars ______(believe) to be black holes.
8. One hundred and sixty US dollars ______(be) what he wants.
9. It is true to say that the more we learn about other people, the better we understand their ideas and , as a rule, the ______(well) we like those people themselves.
2.Translation
1. 星体的密度增大到一定程度时就会发生爆炸。
2. 你能想象黑洞的引力有多大吗?
3. 假如有人掉进黑洞,他会认为很快能到达黑洞的中心。
4. 早在17世纪天文学家便对超新星有过报道。
5. 他已尽了全力以达到自己的目标。
答案部分
一、单项选择题。
1.
【正确答案】 B
2.
【正确答案】 B
3.
【正确答案】 A
4.
【正确答案】 A
5.
【正确答案】 C
6.
【正确答案】 D
7.
【正确答案】 B
8.
【正确答案】 C
9.
【正确答案】 A
10.
【正确答案】 D
二、综合题。
1.
【正确答案】 Word Form
1. revolving 2.
advanced 3.
convincing 4. swallowing 5. were
6. races 7. believed 8. is 9. better
2.
【正确答案】 Translation
1. The star will explode when its
density increases to some extent.
2. Can you imagine how strong the gravitational pull of a black hole is ?
3. If a man fell into a black hole, he would think that he reached the center of it very quickly.
4. Supernovae were reported by astronomers as early as in the seventeenth century.
5. He has exerted all his strength to
attain his goal.