集中施肥 concentrated fertilization
集中施肥 concentrated fertilization
相关考题：
A vessel would be referred to as "stiff" when the weight of the cargo is ______.A.evenly distributed vertically and the double bottoms are fullB.concentrated low and the double bottoms are emptyC.concentrated low and the double bottoms are fullD.concentrated high and the double bottoms are empty
填空题集中施肥体现了土壤（）效应。