--- Did you at the party, Owen?
--- Yes, I was very happy.
A:enjoyed yourself
B:enjoy yourself
C:enjoy yourselves
D:enjoyed himself
如图,反映的是某中学九(1)班学生外出乘车、步行、骑车人数的扇形分布图,其中乘车的学生有20人,骑车的学生有12人,那么下列说法正确的是( )
病毒的生活特点是( )