题目

用豌豆做实验材料是孟德尔成功的关键，豌豆的下列特点不是其原因的是（ ）     A． 严格的自花传粉植物    B．  相对性状易于区分     C． 亲本都是纯种       D． 等位基因的数量少 答案：D12．-Mr Li is the most excellent engineer in our company despite his poor education background．-________．His technical capacity comes from his devotion and rich experience．（　　）A．Four eyes see more than twoB．The end justifies the meansC．Work makes the workmanD．Better late than never