问题
判断题
单相电流通过单相绕组将在电机中产生方位不变而大小和方向随时间按正弦规律变化的磁场，称为脉振磁场。
答案
参考答案：对
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单相电流通过单相绕组将在电机中产生方位不变而大小和方向随时间按正弦规律变化的磁场，称为脉振磁场。
参考答案：对
| 补全对话，选择正确答案。 | |||
| A: I my village. The water is 2 . The air 3 fresh. B: I like my village, 4 . The sky is 5 . The clouds 6 white. I can run on the grass. A: 7 there any pandas in the mountains? B: 8 , there aren't. Are there any fish in the rivers? A: 9 , there are. You 10 see many fish.
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