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） j}.gK6Yq*  
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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） ,YM=?No  
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The second most important constituent of the biosphere is k0j4P^d  
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liquid water. This can only exist in a very narrow range of temperatures, -x6_HibbD  
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since water freezes at 0°C and boils at 100°C. This is [7.Num_L  
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only a tiny range compared with the low temperatures of some Ynf "g#(  
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other planets and the hot interior of the earth, let the temperature __1__ X_X7fRC0  
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of the sun. by controlpanel JzywSQ  
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As we know, life would only be possible on the face of a __2__ FYik}
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planet had temperatures somewhere within this range. __3__ W!ug^2"  
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The earth’s supply of water probably remains quite fairly constant __4__ (BH<\&yHE  
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in quantity. A certain number of hydrogen atoms, which tlO=>  
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are one of the main constituents of water, are lost by escaping [Y
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from the atmosphere to out space, but they are probably just __5__ kygj" @EX  
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about to be replaced by new water rising away from the depths of the __6__ F6CuY$0m=  
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earth during volcanic action. The total quantity of water is not fMf;  
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known, and it is about enough to cover the surface of the globe __7__ ~g[D!HV|yu  
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to a depth of about two and three-quarter kms. Most of it—97% JK{2hr_a  
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is in the form of the salt waters of the oceans. The rest is OFv-bb*YZ  
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fresh, but three quarter of this is in the form of ice at the Poles __8__ :k_)Bh?+  
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and on mountains, and cannot be used by living systems when __9__ 3:sc%IDP  
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melted. Of the remaining fraction, which is somewhat fewer __10__ ZrP 8 />  
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than 1%of the whole, there is 10-20 times as much stored as underground U\{I09@E 0  
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water as is actually on the surface. There is also a minor,

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