熊妈妈有两个小宝宝,大的叫皮皮,小的叫乐乐。他们都在山羊老师的班上。皮皮很贪玩,成绩不理想;而乐乐却很勤奋,成绩当然很不错。一天,熊妈妈要看他们的作业本。她翻开皮皮的作业本,上面有很多“×”,而乐乐的作业本全是鲜红的“√”。熊妈妈皱着眉头对皮皮说:“你呀,作业不认 Bear mother has two small baby, big called Pippi, small is called Lele. They are all in the goat teacher's class. Pippi is very fun, the result is not satisfactory; and Lele is very hardworking, of course, the results are very good. One day, bear mother to see their homework. She opened Pippi's homework, with a lot of “x” on it, and Lele's homework was all bright red “√”. Bear mother frowned on Pippi said: "You, the operation does not recognize