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Watch Later 3:17

Chemistry tutorial-Ch24-4-Molecular shapes of PCl5 and SF6

Watch Later 6:58

Chemistry tutorial-Ch24-3-Molecular shapes of BeF2, BF3, CH4, NH3 and H2O

Watch Later 2:41

Chemistry tutorial-Ch24-2-VSEPR Theory

Watch Later 6:18

Chemistry tutorial-Ch24-1-Molecules with non-octet structures

Watch Later 3:00

國共合作與分裂1

Watch Later 9:59

mr_比例尺2

Watch Later 3:48

mr_比例尺1

Watch Later 2:58

國共合作與分裂25

Watch Later 3:14

國共合作與分裂24

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