Limestone that can be highly polished is _______ marble.

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问题 Limestone that can be highly polished is _______ marble.

选项 A、substituted by
B、known as
C、regular as
D、improved by

答案B

解析四个词组的意义分别是A. substituted by由……代替；B．known as称为；C．regular as像……有规则；D．improved by通过……来改进。根据句意选B。句意为：磨得非常光的石灰石称为大理石。

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大学英语六级

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