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dian dong hei ban ca " jie fang " lao shi deng
Pages: 74
Year: Issue:  2
Journal: The Second Class of Guangdong

Abstract: 大连市石道街小学五年级学生郑春阳,从小就喜欢摆弄家里的一些物件,闹钟、玩具火车经常被他拆了装,装了拆.上小学后,学校号召大家做小制作,郑春阳的"才能"逐渐表现出来.看到老师上课时动不动就要擦黑板而且得"吃"粉笔灰,郑春阳决定发明一种黑板擦,把老师"解放"出来.……
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