20200207

關於演講與開放式課程

關於演講與開放式課程(Speech and Open Course)

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# Update = 2020-0207
# Author : Enson, Yu, Ph.D.
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# Keywords: Open Course, Online, Free, Speech, Education, ... .
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# 演講與課程平台


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# 開放式課程與教育平台


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