What is a black hole? Well, it is difficult to answer the question,
% [, T! ?' ]; o# M as the terms we would normally use to describe a scientific phenomenon __1__
- D' Z& A4 A+ P6 n2 G0 c5 G/ ] are adequate here. Astronomers and scientists think that a black hole is __2__8 z6 ~5 n* ~( d' E
a region of space which matter has fallen and from which nothing can __3__; q( T* F% p6 m( J. b3 f4 O
escape—not even light. But we can’t see a black hole. A black hole __4__3 } j! K. E1 f( O @1 o1 d% z
exerts a strong gravitational pull and yet it has no matter. It is only
; F; F# Q& l! |/ B# E% d space—or thus we think. How can this happen? __5__* [4 \) s. x0 G' r( M) U6 h
The theory is that some stars explode when their density increases
) Q) V7 A( c0 Y& ~, ? to a particular point; they “collapse” and sometimes a supernova occurs.0 A4 h w$ l) y% q5 a- |
The collapse of a star may produce a “White Dwarf” of a “neutronstar”—7 o( C* V$ W5 ~% J4 z, H8 `5 O, g
a star which matter is so dense that if continually shrinks by the force of __6___
1 L( e' n% ` S- s its own gravity. But if the star is very large, this process of shrinking may: Q9 u5 V' {) \0 q7 d
be so intense that a black hole results in. Imagine the earth reduced to the __7__. Q4 c& _( n) H
size of a marble, but still having the same masses and a stronger __8__
+ }; z. _% k9 H! L gravitational pull, and you have some ideas of the force of a black hole. __9__% O6 O- v5 `- A) X5 u- r; L
And no matter near the black hole is sucked in. __10__' g/ G0 ?' g& a6 B( O3 B G0 w2 x
参考答案及解析:
! Y/ m9 ^6 n9 P* N6 p- C; h9 F) Z& `8 e supernova 名词,[天]超新星
! s6 _" y V; q' S" U 1. 将as 改为since或者because。在表示原因的连接词中,只有as引导的原因状语从句不能位于主句之后,只能位于句首。: G$ Z' t% y: Q+ O! J, K/ N z* \/ B
2 .将adequate 改为inadequate,或者在are后加not。从逻辑上分析,因为我们拥有的科学术语“不充足”,所以才无法回答这个问题,所以用否定形式。2 t) L0 F) B3 D7 C& m# X0 ?
3. 在which 前加into。这是一个定语从句,意思是“黑洞是太空中物质可以掉进去的地方”,所以定语从句应该为“into which matter has fallen”。
$ T z: A% T: e1 N 4. 将but 改为 so。 上文已提到“连光都无法从黑洞中逃出”,所以我们根本无法看到黑洞。这里应该是因果关系,而不是转折关系。
/ ]* P6 }, ]% Q/ {7 ^: O( y5 ` 5 .将thus改为so。这句话的意思是“那只是空间—或者我们认为它只是空间”。so做 think 的宾语,thus 只能做连词,不能做宾语。
! ^$ V/ p# x4 P2 M! }6 l5 ~ 6. 将which 改为whose。这个定语从句的意思是“它是一颗星,其密度非常大,由于自身的引力,它在不断地收缩”。matter 属于star,所以关系代词应该用whose。: R" y x. d& w- @
7 .去掉in。result为不及物动词,意为“形成了”,而“result in sth。”意为“导致某结果”。
2 T. y9 G, _% Q5 W: w/ w 8. 将masses 改为mass。mass 可指“大量的物质”,而“the masses”特指“劳动群众”,用在此处不妥。
* ~5 i8 W: a4 P! A0 ^4 _2 A2 x 9 .将ideas 改为idea。“idea”在表达“印象”时,为不可数名词,不可以用复数。
( P0 R2 Q2 [) U. Q2 E D! J 10. 将no改为any。分析便知,任何在黑洞附近的东西都会被吸进去。' m' ^+ Q2 L1 ]
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