A.以鄉(xiāng)土樹(shù)種為主 B.適地適樹(shù) C.對(duì)原有樹(shù)木和植被加以利用 D.速生與慢長(zhǎng)相結(jié)合
A.經(jīng)濟(jì) B.技術(shù) C.生態(tài) D.美
A.350 B.550 C.700 D.950