来自任纯力的问题
Alotofstudentsstudyhard,Tomstudieshardest.Alotofstudentsstudyhard,andTomstudieshardest.哪一句对两句中间都是逗号.
Alotofstudentsstudyhard,Tomstudieshardest.
Alotofstudentsstudyhard,andTomstudieshardest.哪一句对两句中间都是逗号.

