第一次擦玻璃(二年级)妈妈让刘扬擦玻璃,这还不容易,刘扬想。他拿来洗干净的抹布,认真地擦起来。可是不管怎么擦,玻璃上总是有抹布擦过的痕迹,直到刘扬的脸上淌下汗珠,玻璃上的痕迹还是擦不干净。刘扬生气了,连抹布都欺负小孩子!他生气地把抹布扔到一边。这时妈妈笑眯眯地走过来,递给刘扬两张旧报纸。“用这个试一试。”妈妈说。刘扬拿起报纸擦了起来,咦?凡是报纸擦过的地方,真是一尘不染,一点痕迹也没有。刘扬歪着头满眼都是问号。你知道这是什么原因吗? The first Cabo (second grade) mother let Liu Yang Cabo, it is not easy, Liu Yang think. He took the clean rag and wiped it carefully. However, no matter how rubbed, the glass is always scratched with rags, until Liu Yang's face drips perspiration, the traces on the glass or rub clean. Liu Yang angry, and even the rags are bullied children! He was angry throwing rags aside. At this time my mother walked smiling and handed Liu Yang two old newspapers. “Try this with you,” Mom said. Liu Yang picked up the newspaper rubbed up, 咦 where newspapers rubbed the place, it is spotless, a trace of no signs. Liu Yang tilted his head all eyes are question marks. Do you know why?