A.林農(nóng)復(fù)合經(jīng)營(yíng) B.林牧復(fù)合經(jīng)營(yíng) C.林果復(fù)合經(jīng)營(yíng) D.林農(nóng)牧復(fù)合經(jīng)營(yíng)
A.1-2倍 B.2-3倍 C.3-4倍 D.4-5倍
A.防洪 B.防沙 C.防風(fēng) D.水土保持