Refining is the process of ________ these impurities from the pu

Refining is the process of ________ these impurities from the pure metal.
A、planting
B、separating
C、manufacturing
D、conducting
【正确答案】:B
【题目解析】:plant种植;seperate分离;manufacture制造;conduct组织,实施
句意:精炼是从纯金属中分离这些杂质的过程。