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） 1h]nE/ T.O  
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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） _y[B/C,q  
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The second most important constituent of the biosphere is /u'V>=D;f  
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liquid water. This can only exist in a very narrow range of temperatures, 0VgsV;  
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since water freezes at 0°C and boils at 100°C. This is c=B!\J<1  
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only a tiny range compared with the low temperatures of some s9b+uUt%  
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other planets and the hot interior of the earth, let the temperature __1__ \S#![N
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of the sun. by controlpanel 3jM+j_nR  
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As we know, life would only be possible on the face of a __2__ /n9,XD&)  
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planet had temperatures somewhere within this range. __3__ ^,fMs:  
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The earth’s supply of water probably remains quite fairly constant __4__ <QRRD*\  
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in quantity. A certain number of hydrogen atoms, which FHyyZ{"  
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are one of the main constituents of water, are lost by escaping 8| S}!P"  
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from the atmosphere to out space, but they are probably just __5__ R|t.JoP9  
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about to be replaced by new water rising away from the depths of the __6__ tq8rG@
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earth during volcanic action. The total quantity of water is not \QMRuR.  
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known, and it is about enough to cover the surface of the globe __7__ 8s<t* pI2  
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to a depth of about two and three-quarter kms. Most of it—97% b#{[Pk,w9  
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is in the form of the salt waters of the oceans. The rest is 3q$"`w  
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fresh, but three quarter of this is in the form of ice at the Poles __8__ lX|d:HFtP  
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and on mountains, and cannot be used by living systems when __9__ A\};^Y  
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melted. Of the remaining fraction, which is somewhat fewer __10__ ? LA`v_  
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than 1%of the whole, there is 10-20 times as much stored as underground KMogwulG  
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water as is actually on the surface. There is also a minor,

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