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        1. The clear colorless liquid that falls as rain, fills lake and rivers, and is necessary for life to exist is . A. oxygen B. petrol C. water D. flood 查看更多

           

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          287. The clear colorless liquid that falls as rain, fills lake and rivers, and is necessary for life to exist is______.

          A.oxygen

          B.petrol

          C.water

          D.Flood

           

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          287. The clear colorless liquid that falls as rain, fills lake and rivers, and is necessary for life to exist is______.

          A. oxygen                 B. petrol                    C. water                    D. Flood

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          The clear colorless liquid that falls as rain, fills lake and rivers, and is necessary for life to exist is   .

          A. oxygen   B. petrol    C. water    D. flood

           

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