英语专业八级改错练习题及答案解析(101)

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　　The second most important constituent of the biosphere is
7 [3 ~1 m: n# q0 q8 f# y' d　　liquid water. This can only exist in a very narrow range of temperatures,
( _9 B  K4 k- B4 ^& Q# H　　since water freezes at 0°C and boils at 100°C. This is
5 z1 _6 D& V0 |; r　　only a tiny range compared with the low temperatures of some
　　other planets and the hot interior of the earth, let the temperature __1__
7 P. n. I2 B3 w8 _8 b　　of the sun.
/ J8 P4 s% b8 S; K" v- [$ Q+ e) }　　As we know, life would only be possible on the face of a __2__
　　planet had temperatures somewhere within this range. __3__
4 N  z! \- ]/ F1 `# ^: k7 V# C　　The earth’s supply of water probably remains quite fairly constant __4__
- D: l" q% w: V5 B$ E! h7 b! H　　in quantity. A certain number of hydrogen atoms, which
0 u% U/ s7 V$ K/ d9 F0 P　　are one of the main constituents of water, are lost by escaping
& E) ~3 e, y& K- Q　　from the atmosphere to out space, but they are probably just __5__
2 i* j& q+ }* ?# U$ L& c* m- ], _　　about to be replaced by new water rising away from the depths of the __6__
  f1 k1 W+ l. e  Y* {- }( _4 t" s　　earth during volcanic action. The total quantity of water is not
+ q1 T- C* j- x$ |: Q　　known, and it is about enough to cover the surface of the globe __7__
1 z' q: t6 e% Q8 X# e+ N　　to a depth of about two and three-quarter kms. Most of it—97%
! n$ j: a) d. }9 t5 [- x2 R$ p　　is in the form of the salt waters of the oceans. The rest is
7 Z+ N) y6 j8 P+ C  @  S　　fresh, but three quarter of this is in the form of ice at the Poles __8__
　　and on mountains, and cannot be used by living systems when __9__
　　melted. Of the remaining fraction, which is somewhat fewer __10__
' R! ~$ H: e- }: Z　　than 1%of the whole, there is 10-20 times as much stored as underground
　　water as is actually on the surface. There is also a minor,
6 s8 v6 r/ S: x3 K, U. A* z7 ]7 q　　but extremely important, fraction of the water supply
% F) K. V# m2 b7 U. ?+ g　　which is present as water vapour in the atmosphere.
  z: M7 c6 z, Q$ `　　答案：
0 b0 B8 p, s( s- ^' I' W! Z　　1.Let ^the 加入alone. Let alone 意为“更不用说”， 表示一种让步关系。
! D: I+ ]& Z  e5 \) k, B+ t　　2.face-surface 根据上下文理解，应该指地球的表面。
7 r) N* r; M4 @8 B　　3.planet^had 加入which或that。这样使得planet后面的句子成为一个定语从句。
% ]( a! x" F+ R: T0 B2 S　　4.去掉fairly或quite 意思重复。
2 s1 ?" K+ |7 }0 ]5 u　　5.out改成outer 这里指外层空间。
8 s. S" {/ A6 b" o　　6.去掉away rise后面不接away。
　　7.and改成although 短文中这里是让步关系，而不是并列关系。
　　8.quarter改成quarters 英语表达中，当分子是二以上的数时，分母应为复数。
; m: z/ e' B. c　　9.when改成until或者unless 根据上下文，这句话的意思应为:除非（冰雪)融化，否则（地球上的）生命系统就无法利用水。所以when在这里的意思有误。
　　10.fewer改成less 文中的remaining fraction 仍指水，因此不能用fewer，要用less。