What is a black hole? Well, it is difficult to answer the question,
2 Y7 w; W$ R' r) H' N' B as the terms we would normally use to describe a scientific phenomenon __1__: C% h* l8 L( o6 H) I) G
are adequate here. Astronomers and scientists think that a black hole is __2__
- w$ T3 o3 m% ^+ P. F6 v0 o/ ? a region of space which matter has fallen and from which nothing can __3__6 f1 _- @, F! {* K- N. [
escape—not even light. But we can’t see a black hole. A black hole __4__
, x" R3 \: v2 m/ r exerts a strong gravitational pull and yet it has no matter. It is only
+ n, C( P k' j2 \/ l space—or thus we think. How can this happen? __5__% T; O5 Y Q% n1 K
The theory is that some stars explode when their density increases
0 [& |3 }6 Y6 u. m+ q1 w to a particular point; they “collapse” and sometimes a supernova occurs.! l- [7 k6 `! H E3 V& |' n
The collapse of a star may produce a “White Dwarf” of a “neutronstar”—
% b9 Z! S( ^4 z+ J1 ]. p' A a star which matter is so dense that if continually shrinks by the force of __6___
9 Z5 m# R! ^9 n# u1 N( y its own gravity. But if the star is very large, this process of shrinking may
: [$ h$ _' ]0 ^% a; e* x5 X7 Q be so intense that a black hole results in. Imagine the earth reduced to the __7__; d. f F2 P3 s6 H; n- _
size of a marble, but still having the same masses and a stronger __8__
$ d/ T9 \5 K/ Y \: n% k gravitational pull, and you have some ideas of the force of a black hole. __9__
9 \, F% ?+ D$ `. e: U5 K; y And no matter near the black hole is sucked in. __10__9 \9 y& w2 ?' B: L* A) d
参考答案及解析:5 W4 Q* K" C% b
supernova 名词,[天]超新星
Y5 v7 F: @8 V) h+ V 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。8 E0 L' I& I$ @7 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。
V$ @. N& X! V5 z! o 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”。
. y' ^+ A/ [1 Q! \6 S 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。; a$ p$ [" _* F3 _! U/ \' z+ @4 o
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。
; r% v6 v3 t: P 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。6 u \) z1 h& ]2 I/ u- Q+ @' k
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”。0 ]. ]- P# t0 |
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。
! J6 d' s! _4 K1 m W$ { z 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。
1 `6 z7 W: g: `- g 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。
7 ]6 n3 W1 Y6 |0 U. ~ j- K |