牛奶是液体,它能做成固体玩具?声音以声波形式传播,我们靠耳朵才能听到它,还能用眼睛看到它?只要有巧妙的方法,没有什么不可能!用牛奶做固体玩具需要的材料一包牛奶、一只锅、一个杯子、一瓶食醋、一只旧丝袜、一把汤匙。巧动手1.把牛奶全倒到锅里加热,等牛奶沸腾时熄火。2.往牛奶里加一汤匙食醋,搅拌均匀,让牛奶自然冷却。 Milk is a liquid, it can be made into a solid toy. The sound is transmitted as a sound wave. We can hear it by the ear. Can we still see it with our eyes? There is nothing wrong with smart methods! A pack of milk, a pot, a cup, a bottle of vinegar, an old stocking, a spoon. Qiao hands-on 1. The whole milk into the pan to heat, so when the milk is boiling off. 2. Add one tablespoon of vinegar to the milk, mix well and allow the milk to cool naturally.