Cho tam giác ABC, các đường trung tuyến BD, CE. Gọi M, N theo thứ tự là trung điểm của BE, CD. Gọi I, K theo thứ tự là giao điểm của MN với BD, CE. Chứng minh rằng: MI = IK = KN

vẽ mầm Nl: thêm cái bậc nx là oce r

Ai giải hộ em với ạ em cho 5 sao tiếng anh lớp 9

Mẹ đem về 80 cái kẹo mẹ chia cho c 2/3 cho em số còn lại Hỏi em đc bao nhiêu c đc bao nhiêu. Gòi cho mk hỏi lun là trưởng nhóm chị em cây khế có cho mk vào đc k ạ

Em có biết tên hà nội có ý nghĩa gì ko?

Read the following passage, and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions. Education System of Viet Nam in the Past Because of 1, 000 years under the control of China, there were no records which indicated a formal education system in Viet Nam. In 939, Emperor Ngo Quyen expelled the Chinese invaders and declared Vietnamese independence. But the first two dynasties Ngo and Dinh did not last so long, and were busy with the national defense, so the education was just in pagodas. Ly Cong Uan, the founder king of the dynasty had been educated in a pagoda. To the Ly dynasty, the fundamental education system was officially improved. King Ly Thanh Ton established the Temple of Literature at the ancient Capital of Thang Long to encourage people to appreciate the education. In 1075, the first exam was done by the order of King Ly Nhan Ton to select scholars for the office and the later year, 1076, the Imperial Academy, the first university in Viet Nam’s history, was set up for the education of sons of royalty and other high-ranking officials. There were also many private classes taught by prominent scholars such as Chu Van An, Le Quy Don, Nguyen Binh Khiem, Phung Khac Khoan, Vo Truong Toan… The students would only study literature and ancient history of China, of Viet Nam for entirety of their schooling. Later on, the Public Administration curriculum was finally added to the programme. When the Ho Royal family ruled the country, students were taught simple mathematics. From 1918 to 1945, Viet Nam’s education programme adopted the western education system with three levels:elementary, high school, and college. At all levels, from 1945 the Vietnamese national language is officially used. Students have the opportunity to learn literature, history, philosophy, law, science, math, medicine and other languages. 27. In the 10th century, parent __________. A. could let their children have a formal education. B. were too busy to send their children to school. C. could send their children to pagodas to have some schooling. D. didn’t want their children go to school under the control of China. 28. All of the following were done during the Ly dynasty EXCEPT that __________. A. all good students could go to Imperial Academy B. King Ly Thanh Ton established the Temple of Literature C. the Imperial Academy was established in 1076 D. King Ly Nhan Tong ordered to hold the first exam to select scholars. 29. In the past, students mostly learned _______________. A. public administration B. science subject and mathematics C. the ways to rule the country D. literature and ancient history 30. We can infer from the passage that __________. A. the private classes replaced the Imperial Academy B. education was highly appreciated during the dynasties C. mathematics was highly developed during the Ho dynasty D. the prominent scholars such as Le Quy Don couldn’t teach at the Imperial Academy

Các anh chị giúp em với ạ ai trả lời sớm nhất em vote 5*

y=cosx- √3sinx Tìm giá trị lớn nhất, nhỏ nhâts

Một mảnh vườn hình chữ nhật co chiều dài là 10,34 m và chiều rộng là 5,7 m. Tính chu vi và diện tích mảnh vườn ( làm tròn đến hàng đơn vị )

More than 90 percent of teenagers nowadays use social media. The increasing usage of social media has led to (21)________ large number of teenagers to be bullied or become a bully online. Cyberbullying, a (22)___________ to describe bullying that happens on technology platforms, is a serious problem. Studies show that teenagers often say mean thing and hurt other people because they are not aware of the effect of their action. When you socialize in real life, facial expressions and body language allows you (23)_________ what you say can be hurtful. The same thing cannot be said about when you socialize, using social media. Teenagers also bully because they can get away with it. Teens can (24)_________ bully their peers online without facing any real consequences. Being bullied can lead to (25)______, low self-esteem or suicide thought. Cyberbullying also (26)__________ the bullies who often have problem like violence tendency, alcohol and abuse. 21. A. a B. an C. the D. no article 22. A. way B. mean C. term D. kind 23. A. realize B. to realize C. realized D. realizing 24. A. easy B. easily C. easier D. the easiest 25. A. depression B. happiness C. cheerfulness D. pleasure 26. A. effect B. effects C. affects D. affect