题目内容：
When metal is heated and then quickly cooled, ________ , by dipping in water, it becomes very hard. (本题1.0分)A、 in general
B、 for example
C、 on the other hand
D、 what.s more
参考答案：
选择题：When metal is heated and then quickly cooled, ____
- 题目分类：河北工业大学-会计-大学英语(一)(高起专...）
- 题目类型：选择题
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A、 in general
B、 for example
C、 on the other hand
D、 what.s more