第一節超簡單,國中等級的向量
以為電磁學不過如此
結果下一節風雲變色
一堆奇奇怪怪的向量跟符號
搞得我好亂啊啊啊
看到班上的人全都是
http://i.imgur.com/iLz48yB.jpg
![](https://i.imgur.com/iLz48yB.jpg)
才第三個禮拜就上到黑人問號怎麼辦?
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