What is a black hole? Well, it is difficult to answer the question,
+ a6 u8 z* j" ]" X' i as the terms we would normally use to describe a scientific phenomenon __1__8 N- ^9 r: [- {
are adequate here. Astronomers and scientists think that a black hole is __2__
! y7 _: p* V, L. r& D2 E# n a region of space which matter has fallen and from which nothing can __3__
8 D& {( C3 ? f, ^6 { escape—not even light. But we can’t see a black hole. A black hole __4__5 g+ { _4 m4 j& u- Q* e% O( o7 e( n
exerts a strong gravitational pull and yet it has no matter. It is only
. V# b5 a9 i7 V% B2 ?, N# o space—or thus we think. How can this happen? __5__0 k9 ^+ L1 d1 t% ?
The theory is that some stars explode when their density increases
7 d" i" ~% \/ B; | to a particular point; they “collapse” and sometimes a supernova occurs.
, J, A! h* Q5 D7 r* [7 \& H6 U. O T The collapse of a star may produce a “White Dwarf” of a “neutronstar”—2 @2 ]8 N9 X. ^3 b E6 m
a star which matter is so dense that if continually shrinks by the force of __6___
# T. }! D. X: h1 z# q, t+ b its own gravity. But if the star is very large, this process of shrinking may# D4 J( w2 T1 [5 p7 e; o$ u
be so intense that a black hole results in. Imagine the earth reduced to the __7__
5 Q, K. I4 f. Z1 @6 G* r size of a marble, but still having the same masses and a stronger __8__
U: w; s, y+ j gravitational pull, and you have some ideas of the force of a black hole. __9__$ O( b1 s* N3 ?" d
And no matter near the black hole is sucked in. __10__/ M- ^' B2 ~. u3 |, p' w
答案:
* S8 e; n, q0 D1 T! z3 b j 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。
6 B K! w$ Q' r' Q) K: y& V$ x 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。
9 [) _9 l4 J' W4 T 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”。
1 h* q3 R! X! \- M 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。' C& t% d/ e( [3 h1 p
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。
% c6 ^& C0 {* B4 F2 H; \8 b 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。- d$ o$ }$ `' Z8 K4 w9 @& y
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”。& P+ z0 O" E9 D2 X
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。' h3 @8 _8 y5 |0 b
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。
! [ n, a) k2 b7 P' A2 H 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。 |