17.如图所示一个闭合环形线圈放在变化的磁场中磁感应强度b随时间t的变化如图a所示设在第1s内磁感线垂直于线圈平面�里如图b所 Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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tomski17.如图所示一个闭合环形线圈放在变化的磁场中磁感应强度b随时间t的变化如图a所示设在第1s内磁感线垂直于线圈平面�里如图b所 coloring