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【判断题】
通电矩形线圈平面与磁力线垂直时，线圈的任何一边都不受力。( )A.
正确
B.
错误
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【简答题】Hello, I’m Lucy. I am from the USA. But now I’m in China. My teacher is Miss Chen. She is from Tianjin. She is Chinese. I have a sister. Her name is Lily. Sheis in China , too.We are in the same schoo...
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