B
boy_v.i.p_9x
B1: ve m' doi xung vs m qua guong
B2:ne n' doi xung vs n qua guong
B3: ve 2 tia sang tu m toi 2 mep guong cho tia phan xa. neu dat mat trong vung nhin thay cua n' dc tao boi guong va 2 tia px tu 2 mep guong => ta nhin thay anh cua n'
tuong tu nhu the vs m
nho thanks minh nha
B2:ne n' doi xung vs n qua guong
B3: ve 2 tia sang tu m toi 2 mep guong cho tia phan xa. neu dat mat trong vung nhin thay cua n' dc tao boi guong va 2 tia px tu 2 mep guong => ta nhin thay anh cua n'
tuong tu nhu the vs m
nho thanks minh nha