A.表皮B.次生韌皮部C.次生木質(zhì)部D.形成層
A.常綠、木本B.花兩性、各部分離生C.花被無萼片和花瓣之別D.木質(zhì)部具螺紋導(dǎo)管
A.CDKB.CyclinC.cdcD.CKI