A.主體、客體、內(nèi)容B.當(dāng)事人、經(jīng)濟(jì)行為、經(jīng)濟(jì)利益C.法人、經(jīng)濟(jì)合同、經(jīng)濟(jì)責(zé)任D.經(jīng)濟(jì)管理、經(jīng)濟(jì)協(xié)作、經(jīng)濟(jì)責(zé)任
A.休閑 B.復(fù)種 C.免耕 D.輪作
A.150% B.200% C.400% D.300%