A:C6H5—CH2OH
B:HO—C6H4—CH3
C:C10H7—OH
D:C6H5—CH2CH2OH
Shanghai lies _______ the east of China and _______ the northeast of Guangdong.
梅兰芳是江苏近代文化名人(下图),著名的戏曲艺术表演大师,他所代表的剧种( )
基因型AaBb的个体与基因型aaBb的个体杂交,两对基因独立遗传,则后代中 ( )
下列基因中属于等位基因的是