Tìm n để các phân số sau tối giản: a, $\frac{2n+3}{4n+1}$ b, $\frac{3n+2}{7n+1}$ c, $\frac{2n+7}{5n+2}$ Chú ý: Làm hết cả ba câu. Nếu muốn làm hai hoặc 1 câu thì bình luận

Cho tam giác ABC có Ĉ − 3 B̂ − 2Â = −3° và 5B̂ − 2Â = 16°. Tính các góc từ đó so sánh các cạnh trong tam giác ABC. ai nhanh nhất và đúng mk vote 5 sao nha camon mn nhìu

tìm m để bpt x^2-2mx+4>0 với mọi m thuộc R

Choose the word whose underlined part is pronounced differently from that of the others. 1. A. wanted B. naked C. finished D. needed 2. A. touch B. down C. account D. sound Choose the word that is stressed differently from that of the other words. 3. A. classical B. poisonous C. logical D. pollution 4. A. dramatic B. tornado C. historic D. injury Mark the letter A, B, C or D to indicate the correct answer to each of the following questions. 5. Water _______ in the lake has made the fish die. A. pollution B. pollute C. polluted D. polluting 6. _____ workers were sent to the area immediately, but no villager was survived when the landslide happened. A. help B. Rescue C. volunteer D. assistance 7. Three hundred people were left _____ by the earthquake. A. home B. property C. homeless D. house 8. The train or Ha Noi ______ at 7a.m tomorrow. A. leaves B. leaving C. to leave D. left 9. Environmental pollution has _____ to lots of health problems. A. caused B. got C. made D. led 10. The heavy rain has caused _______ in many parts of the country. A. drought B. storms C. forest fire D. floods 11. I am very________that you passed your English exam last week. A. nervous B. delighted C. disappointed D. beautiful 12. Singapore is famous for its __________ and green trees. A. cleanliness B. cleanly C. cleaning D. clean 13. In some English speaking countries, turkey and pudding are ___________ food at Christmas. A. national B. historical C. traditional D. possible 14. The roof of the building _____________ in a storm a few days ago. A. damaged B. was damaged C. has damaged D. has been damaged 15. I never go to Australia. I .................. to Australia yet. A. went B. have been C.will go D. haven’t been 16. I’m .................. Let’s do something. How about going to a movie? A. boring B. bore C.bored D. being bored Mark the letter A, B, C or D to indicate the most suitable response to complete each of the following exchanges. 17. - John: “How lovely your pets are!” - Peter: __________. A. I love them, too B. Really? They are C. Can you say that again D. Thank you, it’s nice of you to say Mark the letter A, B, C or D to indicate the word(s) CLOSEST in meaning to the underlined word(s) in each of the following questions. 18. Our parents join hands to give us a nice house and a happy home. A. work together B. manage C. help together D. deal with Mark the letter A, B, C or D to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions. 19. Many people were starving because of the failure of this year’s harvest. A. hungry B. rich C. full D. poor Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part that needs correction. 20. In stead of throw away all our waste paper, glass, metal, we can recycle a lot of it. A B C D 21. Hundreds of houses destroyed after a tornado hit the small town of Texas. A B C D 22. The earthquake occurred at midday when many people had had lunch.

Hộ mình với ạ cảm ơn bạn nhiều

vì sao chữ viết thời nhà Thương (TrungQuốc) được gọi là chữ Giáp Cốt)

Giúp mk vs mk sẽ vote 5 sao+cảm ơn

Phong tục và tập quán của người Chăm và Việt là j

hứa cho 5 sao cho ai nhanh và đúng nhất

Viết đoạn văn khoảng nửa trang giấy làm rõ quan điểm: Học phải đi đôi với hành