多指(如六指)是由显性基因控制的。如果一方是多指,另一方正常,他们的子女是( )
A:都患多指或一半患多指
B:一半多指,一半正常
C:全部多指
D:全部正常
—They are having lunch in the dining hall.
The police _________ searching a man with a beard now.
宇宙蕴藏着无穷的奥秘,以下说法正确的是( )