trích:
chung ta bat dau hoat dong tu bay gio nhe
ban nao co gi thac mac ve hoc tap hay gui bai len nhe
cac ban co thay rang khoi a kho ko ? Ko hieu sao minh luon gap nhung loi can ban vua bai toan trong khi minh van tim gia huong giai nen da so cac diem khoi a cua minh luon trung binh du minh rat hieu bai
Gửi lúc - 10/11/2002 : 20:53:51
tui cung nhu anh do hieu ma saodiem van ko gioi
lam sao minh co the nho duoc lau nhung cong thuc toan hoc cu nhi
tui da thu hoc thuoc va on nhung khi ap dng lai rat kho nho duoc lam sao day?
bn thu lai nhe neu co ket qua nho mail cho tui nha(chocontantat182002@yahoo.com)
khoiA bat dau hoat dong
Gửi lúc - 15/10/2002 : 18:42:51 
