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【题目】About ________ percent of the earth's surface is covered with water.

A.29 B.82 C.71 D.100

【答案】C

【解析】地球表面约71%的面积被水覆盖,故选C.ABD项数据不对,排除ABD.句意:地球表面约71%的面积被水覆盖。

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