A-A+
A．To burn it on the fire to see whether it can
问题详情
A．To burn it on the fire to see whether it can break.
B．To press it in the size of an egg.
C．Add water to it to see whether it is shiny.
D．Take some of it in the testing machine.
参考答案
正确答案：C
解析：题干问题是如何识别粘土。文章中的关键句为because it is very shiny when it is wet，因为粘土遇水会发亮，所以鉴别的方法是加入水。
