单项选择题
A.兴利服从防洪B.防洪服从兴利C.二者兼顾D.灌溉优先
A.0.3mB.0.5mC.0.8mD.1m
A.0.15mB.0.30mC.0.45mD.0.60m
A.增设后戗B.抛石护坡镇脚C.排桩防塌D.笼石护岸镇底
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