user-avatar
Nhithuy
2 năm trước
Viết các PTHH thực hiện các chuỗi biến hóa sau, ghi rõ điều kiện phản ứng (nếu có): a) CaO CaCO3 CaO CaC2 Ca(OH)2 b) Na NaCl NaOH Na2CO3 CO2 Ca(HCO3)2
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

Exercise 2. Complete with there is, there are 1. _________ a tree in our garden. 2. _________ a girl called Tabatah in my class. 3. _________ cows in the field. 4. _________ some very big ships in the harbor today. 5. _________ fish for dinner. 6. _________ a girl in my class who can walk on her hands. 7. _________ nothing to do when it rains. 8. _________ cat sitting on the bench. 9. In our park _________ some great things to play on. 10. In our park _________ a fountain where we can drink water. 11. _________ a computer in the classroom. 12. _________ some posters in my office. 13. _________ a CD player in my bedroom. 14. _________ 30 desks in the hotel. 15. _________ a blackboard in the classroom. 16. _________ some dictionaries in the library. 17. _________ some blue fish in the ocean. 18. _________ a tree in the field? 19. _________ any plants in that garden? 20. _________ a cinema in my town? 21. _________ some fantastic beaches at the Costa del Sol. 22. _________ (not) a hole in the floor. 23. _________ (not) a tram station in Alhaurin de la Torre. 24. _________ many schools in Fuengirola. 25. _________ (not) a swimming pool in town. 26. _________ many animals in the Zoo. 27. _________ (not) a snake in the window. 28. _________ an eel in the aquarium? 29. _________ any children in the park? 30. _________ (not) a gorilla in the tree. 31. _________ a lot of traffic in Valencia. 32. _________ anywhere to park around here? 33. _________ only one way to solve this problem. 34. _________ enough time to finish? 35. _________ (not) many tigers left in the world. 36. _________ any public buses in Los Angeles. 37. _________ anyone here who wants to volunteer? 38. _________ many windows in the room? 39. _________ (not) a TV in my kitchen. 40. _________ two chairs in the living room. Exercise 3: A. Fill in the gaps with the comparative form of the adjectives given. 1. A rock is......................... than a leaf. (heavy) 2. Our house is..........................than yours. (big) 3. The princess is............................than the witch. (beautiful) 4. Tom is a......................student than Mary. (good) 5. Bicycles are.....................than motorbikes. (safe) 6. July is...............................than January. (hot) 7. A lion is...............................than a cat. (dangerous) 8. Helen is..........................than Mary. (happy) 9. Computers are..................................than telephones. (expensive) 10. I think golf is.................................than football. (boring) B. Fill in the gaps with the superlative form of the adjectives given. 1. It is the..................shop in town. (large) 2. Monday is the.....................day of the week. (bad) 3. Ben was the........................person in his family. (noisy) 4. Sam is the in the.............................class. (popular) 5. Which is the.......................................subject at school? (difficult) 6. Jim is the.....................................player in the football team. (good) 7. Elephants are the................................animals. (heavy) 8. Let's pick the.........................................apple of the tree. (big) 9. Mary is the........................girl in the class. (thin) 10. That is the...............................sofa in our house. (comfortable) C. Fill in the gaps with the comparative or the superlative form of the adjectives given. 1. This armchair is.................................................. the old one. (comfortable) 2. Trains are..................................................... aeroplanes. (slow) 3. I bought ............................souvenir I could afford. (expensive) 4. In this classroom there are...........................girls than boys. (many) 5. Ann is ............................child in the family. (young) 6. That TV set is ............................ of all. (cheap) 7. You are...............................here than there. (safe) 8. Fifi is...................................Kate. (pretty) 9. This is ......................................film i have ever seen. (exciting) 10. Tim is.................................Peter. (talented) 11. Is Ho Chi Minh City......................................Ha Noi? (big) 12. Summer is.......................................season of the year. (hot) 13. Mount Everest is.........................................Mount Fuji. (high) 14. Antarctica is .........................................place in the world. (cold) 15. Living in the city is..............................living in the country (noisy) 16. .............................desert in the world is Sahara. (hot) 17. Nile river is ...............................Mekong river (long)

Choose the word whose underlined part is pronounced differently from the rest 1. A. mother B. father C. sometimes D. umbrella 2. A. bus B. brush C. put D. come 3. A. pony B. judo C. Monday D. open 4. A. brother B. homework C. below D. coconut 5. A. month B. going C. summer D. monkey 6. A. cats B. dogs C. shops D. clocks 7. A. sentences B. oranges C. invites D. brushes 8. A. tables B. shoes C. fences D. apples 9. A. bananas B. Physics C. Lessons D. posters 10. A. teaches B. lives C. finishes D. passes 11. A. baths B. beds C. toilets D. sinks 12. A. desk B. chairs C. cookers D. pictures 13. A. break B. sheep C. tea D. peach 14. A. piece B. receive C. friend D. niece 15. A. gym B. invitation C. circle D. ship 16. A. seat B. sit C. chick D. picture 17. A. bread B. teacher C. threaten D. head 18. A. scene B. pretty C. meat D. wheel 19. A. historic B. exciting C. expensive D. scene 20. A. invite B. build C. physics D. politics 21. A. sugar B. nice C. blossom D. summer 22. A. finish B. toothbrush C. sure D. sentence 23. A. machine B. shopping C. celebrate D. wish 24. A. special B. central C. school D. ceremony II – STRUCTURE Exercise 1: put the verbs in the brackets into the correct forms 1. His brother ......................(eat) lunch in the school canteen. 2. He ............................(go) to the judo club every Sunday. 3. Mary and Linda ...................................(do) their homework at the moment 4. Mr. Brown.............................(not live) here, he.....................(live) in London. 5. One of my friends...............................(live) in Ho Chi Minh city. 6. listen! the bird...............................(sing). it's a beautiful voice! 7. Tom...................................(often go) to school in time in the morning 8. My grandmother .................................(not like) milk, she.........................(like) coffee. 9. Keep quiet! the baby......................................(sleep) 10. What you...........................(have) for breakfast? 11. The children ...........................(not do) their homework now, they..........................(watch) TV. 12. What you..........................(do) here? your mother...........................(look for) you. 13. His house........................(be) near his school. 14. They..................................(work) on a project about their neighbourhood this week. 15. He often .......................(have) breakfast early and he..........................(have) breakfast now. 16. Hurry up! it....................(get) dark. 17. My sister.....................................(get) married next month. 18. Where is Hung? He...............................(have) a shower. 19. How many classes..............(be) there in your school? 20. How.....................(be) your first week at school?

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team