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） Eq tL&UHe  
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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） ZCZ@ZN  
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The second most important constituent of the biosphere is OE0G*`m  
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liquid water. This can only exist in a very narrow range of temperatures,
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since water freezes at 0°C and boils at 100°C. This is LWTPNp:"{w  
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only a tiny range compared with the low temperatures of some lqMr@ :t  
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other planets and the hot interior of the earth, let the temperature __1__ IL An2W  
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of the sun. by controlpanel i@5Fne  
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As we know, life would only be possible on the face of a __2__ dTK0lgkUE  
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planet had temperatures somewhere within this range. __3__ eZU9L/w:  
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The earth’s supply of water probably remains quite fairly constant __4__ 9-{=m+|b  
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in quantity. A certain number of hydrogen atoms, which e*lL.  
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are one of the main constituents of water, are lost by escaping HBOyiIm Q  
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from the atmosphere to out space, but they are probably just __5__ :p: C  
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about to be replaced by new water rising away from the depths of the __6__ \298SH(!7  
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earth during volcanic action. The total quantity of water is not 7LVG0A2>7  
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known, and it is about enough to cover the surface of the globe __7__ A/'po_'uy  
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to a depth of about two and three-quarter kms. Most of it—97% esn q/  
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is in the form of the salt waters of the oceans. The rest is LQ# E+id&  
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fresh, but three quarter of this is in the form of ice at the Poles __8__ PT6]qS'1  
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and on mountains, and cannot be used by living systems when __9__ vNv!fkl  
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melted. Of the remaining fraction, which is somewhat fewer __10__ 3J+2#ML  
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than 1%of the whole, there is 10-20 times as much stored as underground \uJRjw+  
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water as is actually on the surface. There is also a minor,

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