问题
填空题
钢淬火时所得马氏体的形态主要决定于其成分，马氏体的硬度主要决定于其碳的含量，马氏体量的多少主要决定于其（）。
答案
参考答案：临界冷却速度
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钢淬火时所得马氏体的形态主要决定于其成分，马氏体的硬度主要决定于其碳的含量，马氏体量的多少主要决定于其（）。
参考答案：临界冷却速度
| 根据短文内容，从下框的A-F选项中选出能概括每一段主题的最佳选项。选项中有一项为多余项。 | |
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