[問題] 電流磁效應 (95建中段考題 97板中段考題)
http://www.badongo.com/pic/9114040
答案是B
可是答案沒有詳解 完全不知道為什麼
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03/25 00:44, , 1F
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03/25 00:45, , 3F
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03/25 00:46, , 6F
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03/25 01:12, , 14F
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03/25 11:57, , 15F
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01/02 14:22,
7年前
, 20F
01/02 14:22, 20F
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07/06 21:52,
6年前
, 21F
07/06 21:52, 21F
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