Điền số thích hợp vào ô trống biết rằng tổng của 3 số ở 3 ô liên tiếp luôn bằng 215 47 95

Cho hai đg thẳng AB và CD song song vs nhau. Đường thẳng a cắt AB tại E, cắt CD tại F( A và C thuộc cùg 1 nửa mặt phẳng bờ EF).vẽ gia Em và Fn của góc AEF và góc EFD. Chứng minh Em song song Fm

Hãy nêu đường lối trong cuộc cải cách mở cửa từ năm 1978 đến nay (Bài 4)

22. The Thang Long Imperial Citadel was built on the location of a Chinese dating from the 7th century. A. border B. soldier C. battle D. fortress 23. The situation to continue. A. cannot allow B. cannot be allowed C. cannot have allowed D. cannot be allowing 24. The public suggested that the factories with waste treatment system. A. would equip B. would be equipped C. should equip D. should be equipped 25. Talking about Tay Phuong Pagoda means talking about a treasure of , an invaluable cultural and historical heritage. A. items B. stone C. sculpture D. objects 26. The machine on by pressing this switch. A. can turn B. can be turned C. must turn D. should be turning 27. The local government suggested a road through the Nam Cat Tien National Park. A. build B. to build C. building D. being built 28. India will provide technical experts, supporting equipment and materials necessary for the restoration of in My Son. A. churches B. pagodas C. mosques D. towers 29. Everybody agrees that no more staff . A. should employ B. should not be employed C. will not be employed D. will be employed 30. It that some foreigners had collected rubbish on Cat Ba Beach. A. could report B. had been reported C. reported D. was reported 31. The most important thing is that we foreign tourists come back to Viet Nam again. A. will make B. should make C. cause D. should cause 32. The next meeting in May. A. will hold B. will be held C. will be holding D. will have held 33. Things clear to them so that they can do the work in the way that you have told them. A. are making B. ought to be made C. have made D. needn’t be made 34. Cigarettes at a bakery. A. must buy B. cannot buy C. cannot be bought D. should not buy 35. Hundreds of thousands of travel to Perfume Pagoda to pray for happiness prosperity in the coming year. A. pilgrimages B. pilgrims C. passengers D. holiday-makers 36. The limestone formation of Thien Duong Cave is more than that of Phong Nha Cave. A. spectacular B. probable C. geological D. sight-seeing 37. During Perfume Pagoda festival, a large number of flock to the pagoda to pray for happiness and prosperity in the coming year. A. spectators B. passengers C. pilgrims D. travellers 38. In the 17th century, the Viet people the temple tower, calling it Thien Y Thanh Mau Tower. A. put on B. looked for C. got into D. took over 39. The police caught the thief the corner of Cascade and Plum Streets. A. under B. at C. on D. in 40. He suggests that they should adopt a different way of bringing up their children. A. parents B. for parents C. toward parents D. to parents 41. If there is a mechanical problem, we suggest the manufacturer directly. A. contact B. to contact C. contacting D. to contacting 42. It is that the best time to visit Hanoi is September. A. believed B. worth C .rumored D. wondered 43. It that Po Nagar Cham Towers were built in the 8th century. A. considered B. was considered C. has considered D. considers 44. I suggest you Ha Long Bay. It’s very picturesque. A. to visit B. visiting C. visited D. should visit 45. A: You really must go to Hoi An to enjoy the full moon at Mid-autumn Festival. B: . A. Yes, that’s what I’ve heard. B. Do you really know about it? C. Yes, I won’t go there. D. No, thank you. 46. She’s interested in studying the ______ maps of different countries in the world. A. geology B. geological C. geologically D. geologist 47. This wooden _______is one of the oldest buildings in the country. A. cavern B. structure C. contestant D. paradise 48. The museum has a big collection of European ________ A. cavern B. sculpture C. complex D. round 49. The final ________is very different from the previous ones of the game. A. complex B. rickshaw C. measure D. round 50. There is a new industrial _______in my town. A. citadel B. sculpture C. fortress D. complex

Phân biệt hệ quy chiếu đứng yên và hệ quy chiếu chuyển động?

Hợp chất A tạo bởi ion M+ và ion X2 2-. Tổng số các hật cơ bản của A là 164, trong đó số hạt mang điện nhiều hơn số hạt không mang điện là 52 hạt. Tổng số hạt mang điện của ion M+ hơn ion X2 2- là 3 hạt. Vị trí của m trong bản tuần hoàn?

16x-8xy+xy^2 phân tích đa thức ạ tks

Câu 17. Dãy oxit tác dụng với dung dịch H2SO4 loãng là: A. MgO, Fe2O3, SO2, CuO. B. Fe2O3, MgO, P2O5, K2O. C. MgO, Fe2O3, CuO, K2O. D. MgO, Fe2O3, SO2, P2O5. Câu 18. Để làm khô một mẫu khí SO2 ẩm có (lẫn hơi nước) ta dẫn mẫu khí này qua A. NaOH đặc. B. Nước vôi trong dư. C. H2SO4 đặc. D. Dung dịch HCl. Câu 19. Dãy các chất không tác dụng được với dung dịch H2SO4 loãng là: A. Zn, ZnO, Zn(OH)2. B. Cu, CuO, Cu(OH)2. C. Na2O, NaOH, Na2CO3. D. MgO, MgCO3, Mg(OH)2. Câu 20. Nhóm chất tác dụng với dung dịch H2SO4 loãng sinh ra chất kết tủa màu trắng: A. ZnO, BaCl2. B. CuO, BaCl2. C. BaCl2, Ba(NO3)2. D. Ba(OH)2, ZnO. Câu 21. Cho một mẫu giấy quỳ tím vào dung dịch NaOH. Thêm từ từ dung dịch HCl vào cho đến dư ta thấy màu giấy quì: A. Màu đỏ không thay đổi B. Màu đỏ chuyển dần sang xanh. C. Màu xanh không thay đổi D. Màu xanh chuyển dần sang đỏ. Câu 22. Trung hòa 200ml dd NaOH 2M cần bao nhiêu ml dd dd H2SO4 0,8M? A. 125ml B. 200ml. C. 250ml. D. 500ml.

Có ai giải thích tại sao lại điền đáp án như thế đc ko ạ???? A volcano is an opening in the earth’s surface through (26) ......... lava, hot gases, and rock fragments erupt. (27).......... an opening occurs when melted rock from deep within the earth blasts through the surface. (28) ........... volcanoes are atop mountains, particularly cone-shaped mountains. The mountains (29)........... are also called volcanoes. Eruptions of volcanic mountains are (30)........... sights. Đáp án từng câu: 26. which 27. such 28. most 29. themselves 30.Spectacular Có ai giải thích tại sao lại điền đáp án như thế đc ko ạ???? Em cảm ơn ạ <3. Mình cần gấp mà số điểm mình tích lũy chỉ có 25 thôi nên cả nhà giúp mk nhé :(

10. I _________buy a new car, so I'm saving as much money as possible. A. will B. am going to C. will be D. can 11. It's difficult to _________a healthy diet with a busy lifestyle. A. balance B. limit C. reduce D. benefit 12. My wife is going on her business next week so I have to ____ most of the chores around the house. A. distribute B. hold C. take D. handle 13. ____ system of the body lets us break down the food we eat and turn it into energy. A. Circulatory B. Digestive C. Nervous D. Respiratory 14. It’s not too late to ____ your bad habits (smoking, drinking, overeating, etc.) and immediately start living a happier, healthier life. A. get rid B. give on C. kick D. remember 15. If people breathe in deeply, their ____ can expand to twice their normal size. A. hearts B. kidneys C. lungs D. stomachs 16. Fish, poultry, beans or nuts ____ half of their dinner plate. A. make of B. make out C. make up D. make up of 17. Yoga increases endurance, ____ and flexibility. A. blood B. powerful C. strength D. strong 18. Acupuncture modality relies on sophisticated skills to select appropriate acupoints to ____ needles accurately. A. infuse B. inject C. insert D. install 19. “Look at those dark clouds!“ - “Yes, it ____ in some minutes.” A. will rain B. is going to rain C. are going to rain D. is raining 20. It‘s very hot. ____ the window. please? A. Are you opening B. Are you going to open C. Will you open D. Won’t you open 21. Although I have taken some aspirin, the headache ________ away. A. isn‘t going B. isn’t going to C. not go D. won’t go 22. Perhaps I ____ New York one day. A. am visiting B. am going to visit C. visit D. will visit 23. ____ by your father? A. Did that book write B. Did that book written C. Was that book writing D. Was that book written 24. Patient: "Please tell me how shall I take this medicine?” Doctor: “____” A. Take it home with you. B. Take it back to me. C. Take it twice per day. D. Take as much as you can. 25. Patient: “____” Doctor: "Yes. But don't worry. You’ll be given painkillers.” A. Will I get better soon? B. Will I be checked for temperature? C. Will it be painful afterwards? D. Will there be any side effects? 26. “I've called many times but the plumber hasn’t come yet.” - “ ____” A. Wait a minute, please. B. We do apologise for this matter. We’ll fix it soon. C. He's maybe busy now. D. The problem has been fixed already. 27. We’re best friends as we have a ____ interest in music. A. passion B. passionately C. passionless D. passionate 28. My teacher assigned us a writing task about ____ of our favorite singers. A. biology B. biography C. biodiversity D. biochemist 29. The local celebrities joined hands to ____ a fund-raising campaign for charity. A. solve B. conserve C. come up D. launch 30. No longer did Pokémon Go become the widespread ____ in Viet Nam. A. effect B. phenomenon C. invention D. news 31. Chopin was considered to be one of the greatest Romantic piano ____ of the 19th century. A. singers B. writers C. composers D. poets 32. This concert marks nine years since the death of Trinh Cong Son, a prominent ____ of modern Vietnamese music. A. comedian B. actor C. contributor D. figure 33. John made me ____ a lot with his hilarious jokes. A. laughing B. to laugh C. laugh D. laughed 34. I’d like ____ all of you to enjoy my party on this Friday. A. to invite B. inviting C. invite D. not invite 35. We expect Linh ____ to the airport late as the plane will take off in 15 minutes. A. to come B. not to come C. not coming D. coming 36. I’m happy ____ that you’ve passed your driving test. Congratulations! A. not hearing B. hear C. hearing D. to hear 37. My mother said that she would rather ____ to Hoi An than Nha Trang. A. to travel B. travelling C. not to travel D. travel 38. I allow my little daughter ____ with her friends in the flower garden. A. not to play B. to play C. playing D. play 39. My parents let my sister ____ camping with her friends in the mountain. A. not go B. going C. go D. to go 40. We intend ____ him the truth for fear that he’ll fly into a fit of madness. A. to tell B. telling C. not tell D. not to tell