Một máy biến thế có só vòng dây ở cuộn sơ cấp là 1000 vòng, cuộn thứ cấp là 2500 vòng. Cuộn sơ cấp nối vào nguồn điện xoay chiều có hiệu điện thế 110V. Tính hiệu điẹne thế hiệu dụng ở hai đầu cuộn thứ cấp? Gíup e với ạ!

8100 kg ...... tấn Giúp mik với

Tìm x biết :(40%.x-1/2):|-1/3|=0,5x

Thể tích H2(dktc) cần thiết để tác dụng với FeO tạo ra5,6gFe

Vì sao phải giữ gìn nhà ở sạch sẽ, ngăn nắp? giúp em với

1. I think we should leave now. TIME …………………………………………………………………………………………… 2. It is necessary that everything ______ ready by two o'clock tomorrow. a. be b. was c. were d. would have been 3. It’ll be much better if we take a rest now. I’m too tired to go on. SUGGEST …………………………………………………………………………………………… .

mn người ơi giúp mk viết đoạn văn bằng tiếng anh về ích lợi của máy tính vs mấy câu thôi cx đc k cần nhiều mt chứ k phải là internet

Hãy xác định câu thơ sau sử dụng biện pháp tu từ nào? A. Trẻ em như buap trên cành B. Trâu ơi ta bảo trâu này Trâu ra ngoài ruộng trâu cày với ta

1. Susan doesn’t like parties, ? A. did she B. does she C. doesn’t she D. she does 2. Her school bag is more colorful than ____________. A. I B. me C. my D. mine 3. When people live in a small lace, life can be very difficult. A. too much B. too many C. a few D. few 4. My uncle ___________ his car to work everyday. A. cycles B. drives C. sails D. flies 5. She didn’t go to the doctor______________she was feeling ill. A. although B. however C. because D. but 6. My cousin, Hoa, is the same age ............. me. A. as B. of C. too D. like 7. ............. bottles of milk does your family need for a week? A. How B. How many C. How much D. How old 8. I last saw my aunt years ago. A. I haven’t meet my aunt for long ago. B. The last time I met my aunt was since years ago. C. I haven’t seen my aunt for years. D. I didn’t see my aunt years ago. 9. Mary wasn’t angry, ? A. was she B. is she C. wasn’t she D. was Mary 10. She cooking in the kitchen at 7 PM tomorrow. A. will B. is C. will be D. be 11. Nam has ___________ pencils than Phong. A. much B. many C. more D. less 12. ............. bottles of milk does your family need for a week? A. How B. How many C. How much D. How old *13. He failed the exam ______________ he didn’t revise the lessons. A. although B. however C. because D. but 14. My cousin, Hoa, is the same age ............. me. A. as B. of C. too D. from 15. We will go to the movie theatre with some friends of _________. A. we B. us C. our D. ours 16. “How often does he go to the school library?” – “…………” A. He reads science books in the library. B. He went to the school library yesterday. C. He often goes to the school library with his friends. D. He goes to the school library twice a week. 17. I like ____________ dress because of _______________ style. A. her- it B. hers- its C. her- its D. hers- its 18. This factory has ____________ workers than that one, so it needs more. A. fewer B. more C. less D. much 19. Big cities are solving population problem, ________________? A. aren’t they B. are there C. are they D. aren’t you 20. ____________ garden is as large as ____________. A. Our- their B. Ours- their C. Our- theirs D. Ours- theirs

Giúp mình phần trắc nghiệm tự làm theo đáp án của mọi người nha