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） A=y24m  
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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） f45x%tha%  
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The second most important constituent of the biosphere is Ey 0 >L  
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liquid water. This can only exist in a very narrow range of temperatures, 8s\8`2=  
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since water freezes at 0°C and boils at 100°C. This is zS#f%{  
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only a tiny range compared with the low temperatures of some )cfp(16  
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other planets and the hot interior of the earth, let the temperature __1__ e<&_tx   
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of the sun. by controlpanel `HMligT  
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As we know, life would only be possible on the face of a __2__ ^^20vwq  
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planet had temperatures somewhere within this range. __3__ 'US8"83  
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The earth’s supply of water probably remains quite fairly constant __4__ ^H@!)+ =  
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in quantity. A certain number of hydrogen atoms, which %tklup]LF8  
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are one of the main constituents of water, are lost by escaping k}+MvGq  
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from the atmosphere to out space, but they are probably just __5__ soFvrl^Ql+  
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about to be replaced by new water rising away from the depths of the __6__ W}<M?b4tP  
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earth during volcanic action. The total quantity of water is not ePu2t3E  
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known, and it is about enough to cover the surface of the globe __7__ ,&O:/|c E  
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to a depth of about two and three-quarter kms. Most of it—97% [W8iM7D  
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is in the form of the salt waters of the oceans. The rest is f0fqDmn  
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fresh, but three quarter of this is in the form of ice at the Poles __8__ D3ZT''  
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and on mountains, and cannot be used by living systems when __9__ 5G42vTDzS4  
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melted. Of the remaining fraction, which is somewhat fewer __10__ M%Kx{*aw&  
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than 1%of the whole, there is 10-20 times as much stored as underground j)lM:vXR  
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water as is actually on the surface. There is also a minor,

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