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【简答题】
随着人口不断增加，经济快速发展，水利基础设施还不能很好地适应国民经济和社会发展的需要，主要表现在（ ）。
A．防洪能力低，洪涝灾害严重
B．水资源供需矛盾尖锐
C.水土流失加剧．水环境不断恶化
D.A．B．C
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参考解析：
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