aay TUITION
李明秋老师、林淑慈老师、黄荟霖老师
Friday, 24 January 2020
F4 chem , chemical bonds - 06
授课内容:< duplet e arrangement >
可以点击视频的右下角,来放大讲解视频:
(可以点击放大图片)
未完,待续...
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