A:Yes, madam, on the second shelf over there.
B:The oranges are very cheap.
C:You like apples, don’t you?
D:Of course, we have some fruits.
乘客坐在行驶的火车上,以火车为参照物人是 ____的,以路旁的树木为参照物时,人是 ____的.
乌贼遇到敌害时,会释放出大量的墨汁,这一现象说明( )
一组数据有m个x1,n个x2,p个x3,那么这组数据的平均数为( )