Giúp mình bài 1 câu a Bài 3 Mình cảm ơn

Giúp mình câu này nha mọi người

Tính lượng oxi cần dùng để đốt cháy hết: a) 46,5g photpho b) 67,5g nhôm c) 33,6 lít hidro

Bài 2 lm ntn ạ giúp e làm 2 câu đấy với

Giúp mình vớiii! Viết đoạn văn cảm nhận về bài thơ Tức Cảnh Pác Bó ( trong đoạn có câu phủ định hoặc nghi vấn )

Bài 2. Một máy biến thế dùng trong gia đình có hiệu điện thế đầu vào là 220V và có hai ngỏ ra 110V và 22V .Tính số vòng dây của các cuộn thứ cấp tương ứng biết cuôn sơ cấp có 3600 vòng. Bài 3.Một máy phát điện xoay chiều cho một hiệu điện thế ở hai cực của máy là 1800V. muốn Tải điện đi xa người ta phải tăng hiệu điện thế lên 36 000V. a) Hỏi phải dùng máy biến thế có các cuộn dây có số vòng theo tỉ lệ nào ? Cuộn dây nào mắc vào hai đầu máy phát điện ? b) Công suất hao phí sẽ giảm bao nhiêu lần ? ( n2 = 20n1 ; 400lần)

a.Phân biệt nghĩa của từ đồng âm trong những câu sau : - Cầm viên gạch gạch lên tường 2 gạch chéo . - Ông lang chuyên chữa lang mặt . b.Cho câu : "Xe con hỏng rồi "khi ai nói câu này từ con là danh từ , là đại từ ngôi thứ nhất , là đại từ ngôi thứ hai

Unit 8 B. VOCABULARY & GRAMMAR I. Circle the odd out . 1. A. stadium B. yesterday C. tomorrow D. Monday 2. A. left B.turn C. right D. ahead 3. A. played B. stayed C. listened D. weekend 4. A. bus stop B. far C. airport D. railway station 5. A. him B. she C.they D. we II. Choose the best answer. 1.I …………………… born on the first of May. A. were B. was C. are D. is 2. The enemy …………………… by night. A. attack B. attacks C. attacked D. did attack 3. Mind about what I just …………………… now. A. said B. say C. did say D. didn’t say 4. Did you ever …………………… of such a thing? A. hear B. hears C. heard D. heart 5. He …………………… some eggs to make cakes. A. buys B. buy C. buied D. bought 6. There …………………… any eggs in the packet when I …………………… the kitchen. A. was/ come B. were/ come C. was/ came D. were/ came 7. I …………………… a English course to improve all the skills. A. not joined B. joined C. did joined D. join 8. We …………………… to our friend last night. A. spoke B. speak C. speaked D. spoken 9. We …………………… and …………………… lunch at the cafeteria with them. A. talked/have B. talked/ had C. talk/had D. talked/ have 10. …………………… you attend yoga class when I …………………… at home? A. Did/ stayed B. Didn’t/ didn’t stayed C. Did/ didn’t stayed D. Did/ stayed 11. I …………………… his car to work while he was sleeping. A. drive B. drove C. driving D. driven 12. The man …………………… the door and …………………… pieces of paper. A. open/ thrown B. opened/ threw C. opened/ thrown D. open/ throw 13. He …………………… them into a room. A. led B. lead C. leaded D. leads 14. He …………………… off his hat and …………………… into the room. A. take/went B. take/go C.taken/go D. took/ went 15. The meeting …………………… 5 minutes ago. A. finished B. finish C.did not finish D. did finish 16. When …………………… she …………………… the report? A. do/ finish B. did/ finished C. did/finish D. didn’t/ finished 17. I …………………… my close friend a cushion for her chair yesterday. A. gave B.give C. gived D. given 18. Hoa’s neighbor …………………… her and then …………………… it very well. A. helped/ fits B. helped/ fit C. help/ fitted D. helped/ fitted 19. I …………………… what teacher …………………… in the last lesson. A. didn’t understand/ said B. didn’t understood/ said C. understand/ say D. understood/ say 20. Yesterday, I …………………… to a souvenir shop near the exit of the aquarium. A. go B. gone C. went D. goes IV. Complete the sentences with the correct form of do or play . 1.Do you often ... exercises? 2. My Dad ... exercises football for the town team when he was young. 3. My sister enjoys ... exercises table tennis in her free time. 4. My brother ... basketball for the school team. 5. We ... gymnastics at school yesterday. 6. I like .... tennis. 7. My friend ... judo twice a week. 8. My mother ... yoga at the new sports centre. V. Complete the following sentences with the correct form of the verbs in brackets. 1.I (not be) ... very happy yesterday. 2. The people in the café (not be) ... friendly when I was there yesterday. 3. I (leave) ... my school bag at school this morning. 4. It (be) ... a great film in 2001. 5. Our teacher (tell) ... us to be quiet yesterday. 6. I went to the shop but I (not have) ... any money. 7. Susan (not know) about the exam and she did very badly. 8. I (buy) a ticket for the football match yesterday. VI. Complete the following sentences with the past form of the verbs inbox. close ask laugh jump rescue start stop walk try study 1.My father Math at university. 2. We were very tired so we walking. 3. I to pick the bag up, but it was very heavy. 4. The firemen the woman from the burning house. 5. The cat up into the tree. 6. After the film, we home. 7. It was very cold so we the window. 8. You are late! The lesson ten minutes ago. 9. The teacher a lot of questions yesterday. 10. The programme was very funny, we a lot.

Giúp mình với mình ngu tiếng anh! - Viết công thức với Although/ eventhough / though + lấy 5 ví dụ với Despite hoặc inspite of

Nhân vật chính của bài SÔng nc cà mau là j ?