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14:58

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2:39

#高清 #教師 #真人 #流出｜張旭微積分2020版(下)｜多變數函數的微積分｜重點十二：等值面與切平面｜精選範例 12-2｜數學老師張旭

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9:53

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8:12

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33:07

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9:30

#瘋狂 #口教 #有料 #高清｜張旭微積分2020版(下)｜多變數函數的微積分｜重點十五：二變數函數的積分｜精選範例 15-3｜數學老師張旭

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13:43

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36:00

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37:38

#無碼 #高清 #素人 #外流｜張旭微積分2020版(下)｜多變數函數的微積分｜重點十七：二重積分的應用｜觀念講解｜數學老師張旭

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5:47

#口教 #有料 #外流 #課堂｜張旭微積分2020版(下)｜多變數函數的微積分｜重點十六：二重積分的極座標轉換｜精選範例 16-1｜數學老師張旭

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