下列变化属于物理变化的是（ ）
A．纸张燃烧
B．玻璃破碎
C．消化食物
D．铁生锈
A、纸张燃烧生成二氧化碳和水，有新物质生成，属于化学变化，故A错；
B、玻璃破碎只是形状发生了变化，没有新物质生成，属于物理变化，故B正确；
C、消化食物是在消化酶的作用下，把大的微粒分解成小的微粒，被人体吸收，有新物质生成，属于化学变化，故C错；
D、铁生锈是铁与氧气、水共同作用的结果，有新物质生成，属于化学变化，故D错．
故选B．
Allan comes from America. His father works in Beijing and his family come to , too. The boy is studying in our school. He is only fourteen, but he is than the other boys. So he sits in Row Six. Allan’s father has a , but Allan comes to school by bus or by bike. Sometimes he here. He likes playing football. So he’s in our class. He can put the pictures and maps on the wall. Allan can English and French. And he knows a little Chinese, too. He often helps Miss Gao to us English. After class we often talk in English or in Chinese. He tells us something about his country. It’s Mid-Autumn Day today. After I ask the American boy to my home to have dinner. My parents give him moon cakes. He likes them very much and eats a lot. He says they are , so we give him some and ask him to take them to his parents before he leaves.
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