6岁之前,可以只玩耍,不必做家务;
6~10岁,偶尔帮助父母洗碗,扫地,买东西;
10~14岁,要剪草坪,洗碗,扫地,给全家人擦皮鞋;
14~16岁,要洗汽车,整理花园;
16~18岁,如父母上班,要每周给家里大扫除一次。
下面是整除的算式是( )
把成熟苹果与未成熟香蕉密封在一起可促进香蕉成熟,这是由于苹果释放出了( )
根据短文选择正确答案
Today is a holiday. Sam is playing football in the park. Amy is playing the guitar(吉他)under the tree. Daming is flying a kite. Lingling isn't here. She visits her grandma today. The children are playing merrily. They think life is like a dream.