某自花传粉植物种群中,亲代中AA基因型个体占30%,aa基因型个体占20%,则亲代A的基因频率和F1中AA的基因型频率分别是( )
A:55%和32.5%
B:55%和42.5%
C:45%和42.5%
D:45%和32.5%
The fire was so damaging that the store had to close its doors.
下列说法中正确的是( )