Which of the following is fired at the highest temperatures?

问题描述:

Which of the following is fired at the highest temperatures?
a.china
b.earthenware
c.porcelain
d.stoneware

a和c是瓷器,b是陶器,d是粗陶器,烧制温度和硬度成正相关,a和c烧制温度最高.