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The main bearing shells are made of steel with a lining of bearing metal which may be white metal, copper-lead or aluminum-tin alloy What is the meaning of “which” in the sentence above?（）

A、main bearing shells

B、main bearing

C、steel

D、bearing metal

时间：2022-01-15 14:09 关键词： 船舶动力装置 海船船员考试

答案解析

D