Which of the following materials (more than one) may form crystalline solids?
问题描述：
Which of the following materials (more than one) may form crystalline solids?
Polymers
Metals
Ceramics
All of the above
None of the above
答
以下那种材料（多选）能生成水晶体?
聚合物
五金,金属
陶瓷
以上所有
以上均不能