A:2a
B:大于2a
C:a
D:大于a
两个同一级相邻的城市,它们的服务范围( )
被除数是三位小数,除数是两位小数,同时去掉它们的小数点。商()
——Don't open the door, _______who knocks on it.——No problem, mom. You've told me many times.