A.舌 B.唇 C.喉 D.鼻
A.1400种 B.140种 C.140000种 D.14000种
A.90% B.60% C.70% D.80%
A.八倍体小麦 B.六倍体小麦 C.二倍体小麦 D.四倍体小麦
A.20% B.8% C.28% D.2%