问题 单项选择题 回收水池的设计水深一般为(),沉高度为()。A.1~2m,0.3~0.5mB.2~3m,0.5~1.0mC.3~4m,0.7~1.2mD.4~5m,0.9~1.4m 答案 参考答案:B