物理课上,老师说固体和水都可以传声音,可是我对此还是将信将疑,于是决定和表弟一起做个实验来验证一下。　　首先来验证固体能不能传声。我们从工地借来了钢管,表弟在钢管一头对着管子敲了几下,果然,在另一头的我听见了双倍的声音,因此可以证明,固体是可以传声的。　　可是怎 In the physics class, the teacher said that both solid and water can transmit sounds, but I still doubted the letter and decided to test it with my cousin. First to verify that the solid can not be transmitted. We borrowed the steel pipe from the construction site. The cousin knocked the pipe one end against the pipe. Sure enough, on the other side I heard a double sound, so it can be proved that the solid can be heard. But how can