7,9,12,16,9,5,2,( )A.0B.1C.2D.3
7,9,12,16,9,5,2,( )
A.0
B.1
C.2
D.3
相关考题:
普通茎尖培养时,切取0.3~0.5cm左右的茎尖组织,可带()个叶原基。A.0B.1C.2~4D.更多
7,9,12,16,9,5,2,( )
A.0
B.1
C.2
D.3