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    5. 直到他摘下太阳镜，我才认出了他。

    Not until he took off his sunglasses             him.

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      The Antarctic Icecap is the largest supply of fresh water,representing nearly 2% of the world's total fresh and salt water. As can be seen from the table below,the amount of water in our atmosphere is over 10 times as much as the water in all the rivers taken together. The fresh water actually available for hu?man use in lakes and rivers and the accessible ground water amount to only about one third of 1 % of the world's total water supply.

     

    Surface area (m2)

    Volume

    (m3)

    Percentage of total(%)

     

    Salt water


    The oceans

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    317,000,000

    97. 2

     

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    25,000

    0.   008

     

     

    Surface area (m2)

    Volume

    (m3)

    Percentage of total(%)

    Fresh water

    Freshwater lakes

    330,000

    30,000

    0.   009

    All rivers(average level)

    ―

    300

    0.   0001

    Antarctic Icecap

    6,000,000

    6,300,000

    1. 9

    Arctic Icecap and glaciers

    900,000

    680,000

    0. 21

    Water in the atmosphere

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    3,100

    0.   001

    Ground water within half a mile from surface

    ―

    1,000,000

    0. 31

    Deep-lying ground water

    ―

    1,000,000

    0. 31

    Total (rounded)

    ―

    326,000,000

    100.   00

    1.What's the best title of this passage?

       A. Fresh water in the world

       B.Protection of the water in the world

       C. Salt water of the earth

       D. Water supply of the world

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       B. Antarctic Icecap and water in the atmosphere.

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       D. Deeplying ground water and Arctic Icecap and glaciers.

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