美美的语文成绩不错,每次语文考试她的分数都是班级里的前三名。可她的数学就差多了,有时成绩好,有时成绩差,不是很稳定。双休日,美美央求妈妈一起去书店买数学辅导书。书店的辅导书有很多种,妈妈为她选了一本《名师练习》。妈妈对美美说:“数学啊,就是需要多练习,你多做数学题,成绩就会好起来。”星期一上学时,美美把《名师练习》带到了学校里。同桌小杰说他也有这一本书,不过他 The results of the United States and the United States good grades, each time she scores in the language test are the top three in the class. But she math worse, and sometimes good grades, and sometimes poor grades, not very stable. Weekends, the United States and the United States begged her mother went to the bookstore to buy math tutorial. There are many bookstore counseling books, mom chose a “teacher practice.” Mom said to the United States and the United States: “Math ah, is the need to practice more, you do more math problems, grades will be better.” “Monday school, the United States and the United States to” teacher practice "to school. At the same table Xiaojie said he also has this book, but he