豌豆花的顶生和腋生是一对相对性状,根据下表中的三组杂交实验结果,判断显性性状和纯合子分别为
A.顶生;甲、乙
B.腋生;甲、丁
C.顶生;丙、丁
D.腋生;甲、丙
答案:B
— Dear, I can find a better job if I go to Germany, maybe.
— Don't be silly.________, you know. [ ]
A. Actions speak louder than words
B. A golden key can open any door
C. A bird in the hand is worth two in the bush
D. Better late than never
让()成为习惯,让()成为美德。
A.标准;嗜好
B.标准;服务
C.爱好;服务
D.标准;效率