放学了,同学们都回了家,整个校园里变得安静极了。突然一间教室里传来了一阵说话声,这是怎么回事?原来是教具模型圆柱和圆锥在争论“谁是兄谁是弟”。“圆锥老弟,你过得怎么样?”一向以“老大”自居的圆柱首先开口问道。“什么?你喊我老弟?”圆锥不高兴地说, After school, all the students returned home and the entire campus became quiet. Suddenly came a burst of voices in a classroom, what’s going on? The original is the teaching model cylinder and cone in the debate “Who is brother who is brother.” “Cone brother, how are you flies? ” Always “” boss “own column first asked. ”What? You call my brother?" Cone said happily,