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When metal is heated and then quickly cooled, ________ , by dipping in water, it becomes very hard.

A、in general  

B、for example

C、on the other hand　

D、what's more

时间：2022-04-02 16:47 关键词：佳木斯职业学院继续教育学院建筑工程技术高起专英语（1）平时作业1

答案解析

B

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