2020-5-13
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13:34:24 @Rintan@mstdn.y-zu.org
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人間の集中力はせいぜい45分と考えると、授業が90分の場合は半分にするべき

10:04:08 @Rintan@mstdn.y-zu.org
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2020-05-12 13:45:22 Posting :neko_smiley: mizukmb@mstdn.nere9.help
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This account is not set to public on notestock.

2020-5-13