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    1. Two thirds of this apple are bad.

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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

    139,500,000

    317,000,000

    97. 2

     

    Inland seas and lakes

    270,000

    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

    197,000,000

    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

    2. The fresh water that humans can use is         ，

       A.   about 1,086,700 m3   B. about 6,300,000 m3

       C.   about 680,000 m3   D. about 2,000,000 m3

    3 Where does the majority of fresh water exist?

       A. In Arctic Icecap and glaciers.

       B. In the Antarctic Icecap. 

       C. In deep ground.

       D. In the atmosphere.

    4. What are the two places where equal amount of fresh water is stored?

       A. Freshwater lakes and all rivers (average level) .

       B. Antarctic Icecap and water in the atmosphere.

       C. Ground water within half a mile from surface and deeplying ground water.

       D. Deeplying ground water and Arctic Icecap and glaciers.

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