اول حاجة اختي تكلمي بالعربية لان المنتدى عربي و ليس فرنسي
and if u want me to ansewer at ur question .... as uwant ... :=)
first the level of majority of the ALGERIAN students cant resist in front of the level of the others
so . the reason is diffrent from one to the other .. u know ievery person has ones hhhhhhhhhhhhh
and then spescialy this materials MATH and PHY.. so SCIENCE too
finally i want say just im kidding at the begining