2008部分英语考博试题--改错

2008部分英语考博试题--改错2008-10-30 00:29四、改错（1分×10=10分） 1Qf5H!5vx  
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2008部分英语考博试题--改错2008-10-30 00:29四、改错（1分×10=10分） c67O/ B(  
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The second most important constituent of the biosphere is (Rs<'1+>  
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liquid water. This can only exist in a very narrow range of temperatures, inR8m 4c]P  
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since water freezes at 0°C and boils at 100°C. This is [f- #pew  
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only a tiny range compared with the low temperatures of some e|Lh~sVq  
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other planets and the hot interior of the earth, let the temperature __1__ R,6?1Z:J  
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of the sun. by controlpanel &=_YL  
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As we know, life would only be possible on the face of a __2__ !f_Kq$.{  
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planet had temperatures somewhere within this range. __3__ {Ivu"<`L3  
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The earth’s supply of water probably remains quite fairly constant __4__ }ZR 3  
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in quantity. A certain number of hydrogen atoms, which *-` /A  
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are one of the main constituents of water, are lost by escaping YzEa?F*$  
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from the atmosphere to out space, but they are probably just __5__ MUVp8!*@  
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about to be replaced by new water rising away from the depths of the __6__ se7_:0+w  
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earth during volcanic action. The total quantity of water is not e$Md?Pq  
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known, and it is about enough to cover the surface of the globe __7__ [Zgy,j\\  
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to a depth of about two and three-quarter kms. Most of it—97% vmW4a3  
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is in the form of the salt waters of the oceans. The rest is ,!u^E|24  
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fresh, but three quarter of this is in the form of ice at the Poles __8__ .6  
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and on mountains, and cannot be used by living systems when __9__ cUS2*7h  
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melted. Of the remaining fraction, which is somewhat fewer __10__ \/{qE hP  
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than 1%of the whole, there is 10-20 times as much stored as underground f)N67z6  
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water as is actually on the surface. There is also a minor,

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