A:{0,2}
B:{2,3}
C:{3,4}
D:{3,5}
Enough sleep is good for health. If you for your favorite games, you will be exhausted the next day.
①平均每个班有____人参加团体操表演?
②____班参加团体操表演的人数高于平均数?____班参加团体操表演的人数低于平均数?
③如果要把这些人排成人数相等的几行,可以排成____行?每行____人?