A:a policeman was asked to help.
B:the area was searched thoroughly
C:it was looked for everywhere
D:Mrs Green reported it to the police
一对表现正常的夫妇,生了一个白化病的儿子(正常基因用A表示,白化病基因用a表示),这对夫妇的基因组成是( )
下列行为对空气质量没有影响的是( )