... thứcChẳng hạn ứng với công thức nghiệm (CH2O)n đúng với mọi n.n= 1 CTPT : CH2O A là andehit HCHOn=2 CTPT : C2H4O A là axit CH3COOH hoặc este HCOOCH3 , n=3 CTPT : C3H6O3...
... 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 ... born.84.Teacher’s Day is a day.Students express their gratitude to their teachers on that day. A. Teacher’s Day is the day which students express their gratitude to their teachers on that day. ... read? 82.He is 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....
... của mạch cực đại thì R bằngDC. A. 30 (Ω); B. 40 (Ω); C. 50 (Ω); D. 60 (Ω).DD.⇒CHỌN A DE. Bài 5: Cho mạch điện xoay chiều như hình vẽ.C = 318µF ; R là biến trở ;lấy 10.318≈π. Hiệu...