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https://soclaimon.wordpress.com/2012/02/14/%e0%b8%9a%e0%b8%97%e0%b8%97%e0%b8%b5%e0%b9%88-8-%e0%b8%81%e0%b8%b2%e0%b8%a3%e0%b8%95%e0%b8%ad%e0%b8%9a%e0%b8%aa%e0%b8%99%e0%b8%ad%e0%b8%87%e0%b8%95%e0%b9%88%e0%b8%ad%e0%b9%81%e0%b8%aa%e0%b8%87/
บทที่ 8 การตอบสนองต่อแสง