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
+ [4 R& S' m$ S5 Q" y! I: u/ |　　liquid water. This can only exist in a very narrow range of temperatures,
　　since water freezes at 0°C and boils at 100°C. This is
　　only a tiny range compared with the low temperatures of some
1 k2 m, ]% U4 F. a+ r0 A. P　　other planets and the hot interior of the earth, let the temperature __1__
1 J; |  Q4 ~4 }　　of the sun.
4 ~% d9 j; K* \+ M2 @9 |; i, ?　　As we know, life would only be possible on the face of a __2__
/ ]+ R8 R# z  M. `  @' ]& t　　planet had temperatures somewhere within this range. __3__
$ H& C$ o* f( D+ v$ _" T& T　　The earth’s supply of water probably remains quite fairly constant __4__
9 r8 c1 P. `7 U$ ^/ I; R+ w7 O7 b　　in quantity. A certain number of hydrogen atoms, which
) v3 M0 P+ h; v6 `+ s　　are one of the main constituents of water, are lost by escaping
/ R( g3 N8 t+ `　　from the atmosphere to out space, but they are probably just __5__
2 p# }* x+ }" @+ X3 ^, a0 Q　　about to be replaced by new water rising away from the depths of the __6__
# J% e" T4 S7 N* {# g# \　　earth during volcanic action. The total quantity of water is not
　　known, and it is about enough to cover the surface of the globe __7__
' X7 G" d' C9 j: ~9 _: j7 n/ m　　to a depth of about two and three-quarter kms. Most of it—97%
- ^! ~" K9 i) h- v9 [# u　　is in the form of the salt waters of the oceans. The rest is
　　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__
　　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,
　　but extremely important, fraction of the water supply
　　which is present as water vapour in the atmosphere.
　　答案：
0 E& ]; S( D! l: e　　1.Let ^the 加入alone. Let alone 意为“更不用说”， 表示一种让步关系。
$ d- Q3 q7 P3 X# q8 I) [6 u　　2.face-surface 根据上下文理解，应该指地球的表面。
　　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。
# q! S- R8 t; E$ h, c3 _　　4.去掉fairly或quite 意思重复。
# }- t' E6 N* ~7 m5 X4 [　　5.out改成outer 这里指外层空间。
　　6.去掉away rise后面不接away。
' S; B8 M$ b, b$ a: k. U) o2 y　　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。
　　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。