n là sô tự nhiên .xác định n để (5n-11)/(4n-13) là số tự nhiên

Cho hình vuông ABCD, cạnh 6 cm , m là trung điểm bc, ac cắt bc tại o, am cắt bd tại i chứng minh : ai=2im, tính oi

2ng đi xe máy khởi hành cùng lúc từ hai nơi A và B cách nhau 111 km và đi ngược chiều nhau. Họ gặp nhau sau 1 giờ 30 phút.tìm vận tốc của mỗi người,biết vận tốc của người đi từ A nhỏ hơn vận tốc người đi từ B là 2 km

Xác định động từ, danh từ, tính từ : niềm vui, yêu thương, tình yêu, vui chơi, vui tươi, đáng yêu. Giúp mik gấp nha

Ố là là Ai nhanh hơn ai¿♥️ Một hình tam giác có độ dài đáy 2,3m và chiều cao 1,5m. Diện tích hình tam giác đó là: A. 3,514 m2 B. 2,145 m2 C. 1,725 m2 D. 17,5 m2

1. I'm practising speacking Enghlish a lot l. I don't want to fail in the oral test =>Because_______________________________________________________________________ 2.The teacher said to Nam,"Don't wait for me, please." =>She asker Nam______________________________

Ai giải giúp em mấy câu trăc nghiêmk với ạ e cảm ơn ah huhu

làm giúp mik bài 3 nhé mik xin cảm ơn

mỗi đoạn văn trong bài BÀI HỌC ĐƯỜNG ĐỜI ĐẦU TIÊN miêu tả cảnh gì

I. Choose the word that has the underlined part pronounced differently from the others. 1. a. candy b. match c. rack d. wardrobe 2. a. object b. socket c. household d. opposite 3. a. safety b. electricity c. myself d. anything 4. a. cupboards b. boat c. soap d. road 5. a. knife b. socket c. desk d. bookshelf II. Choose the word or phrase that best completes each unfinished sentence below or substitutes for the underlined word or phrase. 6. Paul looked at_______ in the mirror. a. he b. herself c. himelf d. hisself 7._______ is a thing that you use in a kitchen for cooking food. a. Cooker b. Cook c. Refrigerator d. Counter 8. You _____ write on the walls. a. have to b. must c .don't have to d.must not 9. You______ come to my party next week; I'd really like you to be there. a. must b. have to c.don't have to d.must not 10. He was angry_____ I was late. a. so b. because c. so that d. although 11. I phone to make sure the train _____. a. arrive b. to arrive c. arriving d. arrived 12. Speak louder _____ everybody can hear you. a. because b. so that c. as d. to 13. She wore a hat to _____ the sun out of her eyes. a. make b. let c. get d. keep 14. He fell off his bicycle and injured himself. a. hurt b. destroyed c. cut d. pained 15. She had to stay in hospital overnight, just as a (n) _____. a. arrangement b. preparation c. agreement d. precaution III. Choose the words or phrases that are not correct in Standard English. 16. I must do all the shopping yesterday because the shops are closed today. A B C D 17. She arrange her desk so that she could reach everything easily. A B C D 18. I couldn't move the piano alone, so I asked Tom give me a hand. A B C D 19. Are you going to let me eating that last piece of blueberry pie? A B C D 29. Angela must cook a lot of food yesterday because they had a party. A B C D IV. Choose the word (a, b, c, or d) that best fits each of the blank spaces. We don't live (21)______ a house or a flat. We live on houseboat. The boat (22) _____ small, but it's quite big inside. Apart from the bathroom, it has only one room, so we (23) _____ do everything there_ eat, cook, sleep and watch TV. We usually keep our houseboat at Little Venice (24)______ London. We're almost in the center of the city there. That's great for clubs, pubs, the theatre, and so on. But the (25) _____ thing about a houseboat is that you can move and take your home (26) ______ you. 21. a. in b. at c. on d. inside 22. a. is b. was c. looks d. looked 23. a. should b. have to c. need d. could 24. a. in b. at c. on d. of 25. a. best b. most c. worse d. fastest 26. a. for b. to c. with d. of