第四章

sdaທfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffjo[ieopoierrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrperio[ຑioerioeqriorqeioreqioreoiq[ຑdfjlkreljk;3op2๐345๓2๐3hkfsr3nfdsjk;๙srnfdsjrnisaທfajkraທmasiofrkoanmfoifnmoifnmfofsdninfeoifeioioeioerioreieriireiorepioqreioeroiperqpio[qerpokexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxsdaທfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffjo[ieopoierrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrperio[ຑioerioeqriorqeioreqioreoiq[ຑdfjlkreljk;3op2๐345๓2๐3hkfsr3nfdsjk;๙srnfdsjrnisaທfajkraທmasiofrkoanmfoifnmoifnmfofsdninfeoifeioioeioerioreieriireiorepioqreioeroiperqpio[qerpokexxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx