cho tam giác ABC, trên AB,AC lần lượt lấy điểm M và N. Biết AM=3cm, MB=2cm, AN=7,5cm, NC=5cm. a) chứng minh MN//BC b) Gọi I là trung điểm của BC, K là giao điểm của AI với MN. Chứng minh K là trung điểm của NM.

1. Why did Paul choose the part of Africa he visited? A. The route wasn’t difficult to travel. B. It will soon change. C. Plants and flowers there are beautiful. D. There is a natural life there. 2. What made the team's journey slow? A. finding somewhere safe to camp B. Being tired to set up the tent C. carrying heavy equipment D. clearing paths through the forest 3. What did Paul worry about during the trip? A. being responsible for a team of people B. bringing the team home safely and quickly C. getting the information he needed D. the number of dangerous animals 4. Paul says that the team didn't have enough food because _____. A. the walk took longer than expected B. some people ate more than they should C. some of the food went bad too D. some people gave the food to the villagers 5. Why were the team grateful to a fisherman they met? A. He let everyone rest on his boat. B. He took a doctor to the team place. C. He helped one of them who was ill. D. He told them which direction to take. 6. How does Paul feel now he is back home? A. He is planning to do another trip. B. He misses the people in the team. C. He is happy because of his safe trip back home. D. He thinks the trip was a valuable experience. Task 2: Listen to the talk again and answer the questions. Write NO MORE THAN THREE WORDS for each answer. 7. How did Paul’ team travel across Africa to Gabon? ………………………………………………… 8. How many scientists were there in Paul’ team? ………………………………………………… 9. What did his team buy when he stopped at villages? ………………………………………………… 10. Did he decide to join another trip to Australia? …………………………………………………

Tại sao (chim non, gà con, vịt con...) có tập tính in vết? Tại sao tập tính in vết có hiệu quả nhất ở giai đoạn động vật mới sinh ra còn về sau thì thấp dần?

Giúp mình với!! Hãy xếp các đơn thức sau thành nhóm các đơn thức đồng dạng với nhau: – 2xy^5 ; 7 ; - 3x^5 y ; 6xy^5 ; x^5 y; 0.

1. Vào thế kỉ VI, triều đại phương Bắc nào cai trị nước ta? Cho biết tên gọi nước ta lúc bấy giờ? Nước ta bị chia thành mấy quận? Đó là những quận nào? 2. Cuộc khởi nghĩa Lý Bí bùng nổ vào thời gian nào? Địa điểm? Vì sao đông đảo nhân dân ta hưởng ứng cuộc khởi nghĩa này? 3. Thời gian thành lập nước Vạn Xuân? Kinh đô và niên hiệu của nhà nước Vạn Xuân?

Giúp mình câu này với thanks mn

Choose the best item among A, B or C to complete the sentences: 1. My father likes watching motor ________________ on TV. A. race B. riding C. racing D. driving 2. My friend Tony is good ________________ volleyball. He plays volleyball very well. A. in B. at C. on D. of 3. Nam is not very ________________. He never plays games. A. sport B. sporting C. sporty D. sports 4. My brother can’t swim ______ he’s afraid of water. A. so B. but C. or D. because 5. We often ______________ to keep fit and stay healthy. A. did karate B. do morning exercise C. play games D. does aerobics 6. I first ______ to Melbourne in 2016 with my parents. A. went B. go C. am going D. goes 7. Swimming is a ______ sport in the summer because people want to be in the water in the hot weather. A. popular B. unpopular C. unhealthy D. bad 8. Please give me the__________control. I want to change into the other channel. A. far B. remote C. farther D. further 9. How many__________did Péle score in total? A. objects B. balls C. aims D. goals 10. Sports ______ an important part in our life. A. play B. do C. make D. act 11. ______________hours a day do you watch TV? – Two or three hours. A. How much B. How long C. How often D. How many 13. ______ you watch the news about COVID-19 last night? A. Do B. Did C. Was D. Were 14. There are two main kinds of sport: team sports and _______________. A. Private sports C. personal sports C. individual sports D. team-work sports 15. Minh often ______ swimming when he was young. A. goes B. does C. went D. did 16. Nam likes watching comedies because they make ______ laugh. A. he B. him C. his D. hers 17. PTQ is not a ______ channel. It’s local. A. national television B. local television C. international television D. nation television 18. Pokemon cartoons are ______ in Japan. A. did B. made C. played D. seen 19. When you go swimming you should wear ______ to protect your eyes. A. racket B. sports shoes C. goggles D. skis English 6 2 20. Millions of children around the world ______ “Hello Fatty”. A. enjoying B. to enjoy C. enjoys D. enjoy

vẽ Graffiti chảy nha, vẽ chữ "Hùng" cộng thêm 1 bức nha! cảm ơn các bạn, anh, chị, cô, chú, bác, ông ngoại, ông nội,..........hì hì

giúp nhé

FeCl2 ---> Fe(OH)2 Giúp em với