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Watch Later 9:26

之5_《背影》課文教學_影片之5

By: soyukyin, Views: 57

之5_《背影》課文教學_影片之5

Watch Later 8:49

之6_《背影》課文教學_影片之6

By: soyukyin, Views: 46

之6_《背影》課文教學_影片之6

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之7_《背影》課文教學_影片之7

By: soyukyin, Views: 68

之7_《背影》課文教學_影片之7

Watch Later 9:49

之8_《背影》課文教學_影片之8

By: soyukyin, Views: 78

之8_《背影》課文教學_影片之8

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之9_《背影》課文教學_影片之9

By: soyukyin, Views: 72

之9_《背影》課文教學_影片之9

Watch Later 15:03

DAT 機械短片1：簡單機械

By: chanchiyeung, Views: 52

DAT 機械短片1：簡單機械

Watch Later 15:06

DAT 機械短片2：槓桿原理

By: chanchiyeung, Views: 90

DAT 機械短片2：槓桿原理

Watch Later 15:06

DAT 機械短片3：滑輪和齒輪

By: chanchiyeung, Views: 116

DAT 機械短片3：滑輪和齒輪

Watch Later 3:34

DAT 機械短片4：油壓控制

By: chanchiyeung, Views: 45

DAT 機械短片4：油壓控制