试题与答案

1997年中国环境状况公报公布,黄河面临污染和断流的双重压力。70年代年黄河断流的年

题型:单项选择题

题目:

1997年中国环境状况公报公布,黄河面临污染和断流的双重压力。70年代年黄河断流的年份最长历时21天,1997年长达()天。

A.133

B.218

C.226

答案:

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