sir DUNG BAI TAP TINH HUHNG HE REN LUYEN CHO HOC SINH CAC Kl NANG NHAN THITC TRONG DAY HOC SINH HOC O TS P H A N BIJC D U V Dqy hqc (DH) ndi chung DH Sinh hqc (SH) hoi rilng khdng chi don thudn Id hon[.]
sir DUNG BAI TAP TINH HUHNG HE REN LUYEN CHO HOC SINH CAC Kl NANG NHAN THITC TRONG DAY HOC SINH HOC O TS P H A N B I J C D U V qy hqc (DH) ndi chung DH Sinh hqc (SH) dii St/ v