问题
填空题
步进电机分三种（）、（）和（）。
答案
参考答案：永磁式；反应式；混合式
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步进电机分三种（）、（）和（）。
参考答案：永磁式；反应式；混合式
This is a Chinese girl. 1 name is Han Mei. She is twelve. She’s in No.3 Middle School. She is in Class One, Grade Two. Jim is 2 American boy. He’s eleven. He is in No.3 Middle School, 3 . Mrs. Wang is their English teacher. She is a 4 teacher. The 5 love her very much .
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