... chéo đáy hìnhchóp Trên đoạn AH lấy điểm M Tìm thiếtdiện tạo mặt phẳng qua M song song với mp(BDE) cắt hìnhchóp Bài 17: Cho hìnhchóp S.ABCD đáy hình bình hành Gọi C trung điểm SC , M điểm di...
... lỳc no cng tỡm c cụng thc Chng hn ng vi cụng thc nghim (CH2O)n ỳng vi mi n n= CTPT : CH2O A l andehit HCHO n=2 CTPT : C2H4O A l axit CH3COOH hoc este HCOOCH3 , n=3 CTPT : C3H6O3 A l hp cht...
... room 21.Malaysia / devided / two regions A.Malaysia is devided into two regions C.Devided into two regions is Malaysia B Two regions is devided into Malaysia D.Malaysia is devided in two regions ... the student.His mother is an athlete A He is the student whose mother an athlete C He is the student whose mother is an athlete B He is the student whom mother is an athlete D He is the student ... when students express their gratitude to their teachers on that day C Teacher’s Day is the day which students express their gratitude to their teachers D Teacher’s Day is the day when students...