one与ones区别？

one 与ones 都有表示替代的用法，one 用来代替上文出现过的可数名词单数，ones 用来代替可数名词复数，如:
1.We have many bikes here. Do you want to have one?此处one 代替一辆自行车
2.Here are many books. These three ones are mine.这里ones 代替books