平时放在铅笔盒里的橡皮,在使用时经常会滚掉或遗失。我想,如果在橡皮中间镶嵌一块小磁铁,使它和铅笔盒内的磁铁相吸,不就解决这一问题了吗?同学们不妨自己动手试一试。带磁性的橡皮@邹海路 The eraser, which is usually placed in a pencil case, is often rolled off or lost when used. I think if a small magnet is embedded in the middle of the eraser to attract it to the magnet in the pencil case, will this not solve the problem? Students may wish to try it for themselves. Magnetic Rubber @ Zou Hailu