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之5_《背影》課文教學_影片之5
By: soyukyin, Views: 70
之6_《背影》課文教學_影片之6
By: soyukyin, Views: 57
之7_《背影》課文教學_影片之7
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之8_《背影》課文教學_影片之8
By: soyukyin, Views: 90
之9_《背影》課文教學_影片之9
By: soyukyin, Views: 83
DAT 機械短片1：簡單機械
By: chanchiyeung, Views: 65
DAT 機械短片2：槓桿原理
By: chanchiyeung, Views: 101
DAT 機械短片3：滑輪和齒輪
By: chanchiyeung, Views: 127
DAT 機械短片4：油壓控制
By: chanchiyeung, Views: 56
