一个数除以8有余数，余数最大是____，最小是____

因式分解：

（1）3a²﹣27                         

（2）a³﹣2a²+a

（3）（x²+y²）²﹣4x²y²

（4）a²（x﹣y）+16（y﹣x）

选一选

节    列    本    条    头   棵   阵    支

几____书    一____车厢    一____黄牛    一____雷声

一____火车    一____桃树   一____铁路   一____毛笔

    Look at this desk. It's Jim's desk. It's brown. Jim's book is on it. The book is his English book. His pencil-box is on it, too. His pencil is in his pencil-box. But where's his pen? He can't find(找到) it.