một khu vườn hình chữ nhật nếu tăng mỗi cạnh thêm 4m thì diện tích tăng thêm 216m2 còn nếu chiều rộng tăng thêm 2m chiều dài giảm đi 5m thì diện tích giảm đi 50m2. Tính độ dài các cạnh của khu vườn ( đừng làm tắt nha)

cho đường tròn o và dây cung cd biết khoảng cách từ tâm tới dây bằng 4cm dây CD =6cm khi đó bán kính đường tròn bằng ? ##giúp mình với !!!

Ktra hộ em vs , đag đọc truyện mak bà bắt ktra bài 🙃

Helppppppppp meeeeeeeeeeeeeeeeee

Giúp mình vớiiiiiiiiiiiiiiiiiiiiiiiiiiiii

Có thể thu khí oxi bằng cách đẩy nước do * Oxi là khí ít tan trong nước Oxi là khí không màu, không mùi Oxi là khí nặng hơn không khí Oxi là khí tan vô hạn trong nước

bài hơi dài tí mấy bạn bỏ ra chút thời gian giúp mình nha PART D: WRITING Part 1: Finish each sentence so that it means the same as the sentence before it. (1.25pts) 27. I have studied English for three years. → I began …..………………………………………………… 28. Mike is not as interested in music as his sister is. → Mike’s sister……………………………………………… 29. My sister can swim well. She can’t play badminton. (but) → My sister ………………………………………...……… 30. She loves French food. She goes to that French restaurant every week. (so) →………………………………………….……………… 31. He was tired last night. He stayed up late to watch a football match. → Although……………………………………………… Part 2. Arrange the words or phrase words to make meaningful sentences. (1.25pts) 32. wearing/ I/ am/ T-shirt/ gave/ you/ me/ birthday/ last.→……………………………. 33. me/ is/ in/ it/ competition/ running/ my school’s. →………………………………... 34. it/ took/ week/ sister/ my/ last. →…………………………………………………… 35. sorry/ am/ I/ hear/ the/ about/ result/ to. →…………………………………………. 36. family/ was/ my/ happy/ fun/ we/ all/ and. →……………………………………….

Trong công thức SO3, lưu huỳnh có hóa trị là * III IV VI II

Ktra giúp em vs ạ , lười quá 😢👀✨

bài nhìn dài nhưng toàn trắc nghiệm thôi B. LEXICO-GRAMMAR: (2.0pts) Choose A, B, C, or D to complete the following sentences. 9. A. killed B. listened C. perfected D. preferred 10. ________many channels are there on your TV? A. Who B. How C. What D. Where 11. Our uncle goes ______two times a month. A. fishing B. fish C. to fish D. to fishing 12. Lan: My class has won the aerobics contest. Mai: ____________ A. Good luck! B. Congratulations! C. See you later. D. Goodbye 13. Home is __________place in the world. A. the safest B. the most safest C. the safe D. the most safe 14. Have you ________seen a rainbow? A. never B. before C. after D. ever 15. Exercising is good ________don’t do too much hard. A. and B. but C. although D. so 16. To play badminton or tennis well, you need to have a good ________. A. glove B. ball C. rod D. racket C. READING (2.5pts) Part 1. Read the passage and choose the correct word to fill in each blank. (1.25pts) Cities look fantastic ___(17)___night. In the evening, the sun goes ___(18)___. The sky gets ___(19)___and darker. Slowly the bright colours go, ___(20)___. Everything looks grey. Then the lights come on. The buildings look beautiful. Cities look ___(21)___at night. 17. A. at B. in C. on 18. A. up B. through C. down 19. A. brighter B. darker C. blacker 20. A. too B. to C. and 21. A. same B. different C. ugly Part 2. Read the letter and mark the sentences as True (T) or False (F). (1,25pts) I always wish to have a motor home in my life. My motor home will not need to be big, but it might have everything I need inside. There will be a small sofa and a lovely table in the head of the car. This will be the place for my friends when they visit me. It is like a living room. The biggest part of my motor home will be my kitchen. It will be in the middle of the car. There will be an automatic dishwasher, a modern fridge, a small oven and an automatic washing machine in the kitchen. A small toilet will be in the kitchen, too. The last part will be my bedroom, also my entertainment place. There will be a small bed, a wireless TV, and a high-tech computer. Everything might be small in my motor home. It would be fantastic if I had my own motor home. The best thing about having a motor home is that I can drive it myself and travel around. 22. What kind of house does the writer wish to have? A. A space houseboat B. An auto house C. A motor home 23. How many parts are there in the house? A. 2 B. 3 C. 4 24. What is NOT true about this house? A. It will not be very big. B. It has everything that the writer needs inside. C. The writer will have to do the laundry by hand. 25. Why does the writer love this kind of house? A. Because the house is big B. Because he can invite friends to his house. C. Because he can travel around with his house. 26. What is the biggest part of the house? A. The living room B. The kitchen C. The bedroom