题目内容：
电机和变压器常用的铁心材料为硬磁材料。( )(本题2.0分)A. 对
B. 错
参考答案：
选择题：电机和变压器常用的铁心材料为硬磁材料。( )(本题2.0分)A. 对B. 错
- 题目分类：平顶山学院-电机学
- 题目类型：选择题
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A. 对
B. 错
A. 对
B. 错
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Which of the following words is a functional word?
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