Cho hình bình hành ABCD, 2 đường chéo cắt nhau tại O. Hai tia phân giác AE và DF của tam giác AOD cắt nhau tại I. Hai tia phân giác BH và CG của tam giác BOC cắt nhau tại K. a) Chứng minh EFGH là hình bình hành. b) Chứng minh O là trung điểm IK.

Tìm câu trả lời cho tớ tớ cho cậu 5 sao

Thomas Edison was a great inventor. He is also a businessman. His father is a political activist, his mother is a teacher and a major influence in Thomas’ early life. He invented many things still in use today. Edison was born in 1847. He was born in Milan, Ohio. He died in1931. Edison built a workshop in Menlo Park New Jersey. This was where he made many of his inventions. He is best known for Phonographs and bulbs. Edison invented a long -lasting light bulb in 1879. It took him a long time. It was difficult to make the lightbulb work. That was one of his greatest inventions. Edison also invented the phonograph. Phonographs play records. Records are discs. They can hold sound. Before cassette tapes and compact discs, records were how people listened to music at home. Edison also helped make movie cameras better. He was known as the "The Wizard of Menlo Park." Edison worked very hard. 27. His jobs aren’t businessman and inventor. ______ 28. He invented light bulb in 1879. ______ 29. His mother affected him a lot in his early life. ______ 30. Thomas Edison died at the age of eighty-six. ______ * Read passage again and choose the best answer (a, b, c or d) (0.5pt) 31. The phrase “best known for” means ______. A. most famous for B. interested in C. worried about D. excited about 32. What is the main idea of the passage? A. Thomas’ parents B. Thomas’ life C. Thomas’ family D. Thomas’ invention

tặng 10 cảm ơn vào những ctl gần nhất nhé

Tìm 1 số tự nhiên có 2 chữ số khi ta viết thêm chữ số 5 vào bên phải số đó thì số đó tăng thêm 230 đơn vị. Số cần tìm là...... Các bạn giúp mình với

Giải chi tiết cho mình câu này với ạ

Em cần các anh/chị hiểu biết ạ Hiện tại em có chiếc laptop dell Inspiron 3501 với cpu là intel core i3 hệ thứ 11 và ram có 4 gb Em muốn nâng cấp máy lên 8gb thì có được không và mất bao nhiêu tiền? ( Do em chưa biết đi đâu để mua ram)

giúp mình bài này với ạ. mình cần gấp. đừng làm tắt nha

Giúp mình với các bạn ơi 21. The air in the city is very ……….(polluted/ pollutedly) 22. The accident happened because of driving………………( careless/ carelessly) 23. She was …………( unhappy/ unhappily) because of her bad result. 24. She has …………..(kind/ kindly) provided a picnic lunch fo us. 25. He shouted and looked …………….……(angry/ angrily/ ) at me when I broke the vase. 26. We are talking about the preservation of …………(natural/ naturally) resources. 27. We’ll make this beach clean and ……….. ( beatiful/ beatifully) again. 27. She sings very ……………..( beautiful/ beautifully). 28. Be ……….( careful/ carefully)! He is looking at you. 29. Minh’s English is excellent. He speaks English………….( perfectly/ perfect ) 30. He ………(hardly tried/ tried hardly/ hard tried/ tried hard) to find a job but he had no luck.

Dẫn 3,36 lít khí CO2(đktc) vào 350ml dung dịch NaOH 1M. Tính khối lượng muối thu được sau phản ứng.