题目内容

Traditionally,chinastone is minedby means of. Through up and down movements, the china stone isand eventually reduced into powder.

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Then it will be put into thein which thepulverizedchinastone powder can be washed.

After that, minerals will be turned into slurry mud and theof the denser material will settle to the bottom.When the moisture content of the slurry mud in thesettling tankreaches over 60%, it needs dehydration.Finally, it becomes malleable mud when water in the mud has.

We use the china stone immediately after being mined.

A. 对
B. 错

Pottersmake brick-shapedDunzi by using a wooden moldbecause it is convenient for standardizing the measurable proportion.

A. 对
B. 错