She likes playing ________piano; her brother likes playing ________ basketball.
A:the; a
B:a: the
C:/; the
D:the; /
下列式子中,是二次根式的是( )
水中游得最快的旗鱼,速度可达108km/h,陆地上跑得最快的猎豹,每秒可跑40m,空中飞行最快的褐海燕,每分钟能飞行5km.比较它们的速度大小,则( )