CH250 OrG.Chem
(^.^) T.T Y.Y (-: 0_o :P (^.^) T.T Y.Y (-: 0_o :P (^.^) T.T Y.Y (-: 0_o :P
Monday 12 September 2011
แบบฝึกหัด Aromatic compound
ฝึกทำโจทย์ค่ะ ^^
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