user-avatar
nguyenquangminh140504
2 năm trước
Vật AB đặt vuông góc với trục chính ,trước thấu kính hội tụ có tiêu cực 8cm.Biết A nằm trên trục chinhs,AB cách thấu kính 1 khoảng 24 cm a.Vẽ ảnh A’b’và nêu tính chất của ảnh b.Tính khoảng cách từ ảnh A’B’tới thấu kính c.Biết vật AB cao 40cm .Tính chiều cao ảnh A’B’
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

10. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Your mother can speak French fluently, __________? A. can she B. can’t she C. does she D. doesn’t she 11. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. I was born __________ September 10th, 1996. A. on B. in C. at D. of 12. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Young people enjoy __________ computer games. A. play B. to play C. playing D. played 13. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. This castle __________ in the 17th century. A. build B. built C. is built D. was built 14. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Nam, together with his friends, _______ anxious to go back to school after Covid 19. A. is B. are C. has D. have 15. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. My sister studied hard, __________ she completed her exam successfully. A. although B. so C. because D. but 16. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. When his parents died, his grandmother __________ him. A. looked into B. looked for C. looked after D. looked up 17. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Sarah is from the USA. She is ____________. A. America B. American C. America’s D. American’s 18. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. We will become doctors and engineers when we __________ up. A. grow B. grew C. growing D. will grow 19. Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. “That’s a nice dress you are wearing!” - “_____________” A. I’m glad you like it B. That’s alright C. That’s nice D. You’re quite right Trang | 1 | 2 | 3 | 4 | 5

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team