选择题:变频器工作频率的给定方法有面板给定、预置给定和外接给定等。 题目分类:电工 题目类型:选择题 查看权限:VIP 题目内容: 变频器工作频率的给定方法有面板给定、预置给定和外接给定等。 参考答案:
The problem ________ when the students refused to do their homework. 好大学The problem ________ when the students refused to do their homework.答案及解析。 分类:电工 题型:选择题 查看答案