Trong một khu vườn người ta trồng tổng cộng 120 cây gồm 3loại bưởi , táo và na . Biết số cây bưởi bằng 2/3 tổng số cây táo và cây na , số cây na bằng 3/5 tổng áo cây bưởi và cây táo . Hỏi mỗi loại có bao nhiêu cây ?

tính diện tích xung quanh của hình hộp hình chư nhật có chiều dài 15 dm , chiều rộng 10 dm chiều cao 5 dm

hãy lập PTHH biểu diễn phản ứng hóa hợp của lưu huỳnh với các kim loại Mg,Zn,Fe,Al.biết rằng sản phẩm là những hợp chất mà trong đó lưu huỳnh có hóa trị 2

thực hiện chuỗi phản ứng: 1. MnO2-->Cl2-->FeCl3-->NaCl-->HCl-->CuCl2-->Cu(OH)2-->CuO 2. NaCl-->Cl2-->HCl-->AlCl3-->NaCl-->HCl-->FeCl3-->Fe(OH)3-->Fe2O3 3. HCl-->NaCl-->Cl2-->NaClO-->Br2-->I2-->F2-->Cl2-->F2-->NaF-->HF-->SiF4-->F2-->HF 4. MnO2-->Cl2-->HCl-->NaCl-->Cl2-->Javen-->NaHCO3-->Cl2-->clorua vôi-->CaCO3-->Cl2-->kali clorat-->Cl2

cac ban tao cho minh mot cap doi gacha life nha nho: ngau, toc den do, nam nu phai ung mau nha

II. Word form: 31. I’m ………………….…………………………… with this film. (bore) 32. There are no clouds in the sky. The sky is ……………………………………………… (cloud) 33. There are ten …………………………………………………… in the contest. (compete) 34. Angkor Wat was ………………………………………………… built for Hindus. (original) 35. He always gives his opinion .................................... (clear) 36. She often goes to church. She is very .................................... (religion) 37. When will they finish the .................................... of bathroom. (decorate) 38. All the dancers and musicians wore .................................... costumers. (tradition) 39. This film is not ....................................for young children. (suit) 40. Planes flew ....................................constantly. (head) 41. On Christmas Day, I often send my close friends .................................. cards. (greet) 42. Paris is .................................... for the Eiffel Tower. (fame) 43. There have been many ....................... achievements in the field of science. (wonder) 44. Last night, the TV program was very ..................................... (interest) 45. He has been an active (participate) .................................... …….in the discussion. 46. .................................... he was ill on the day of the pop festival. (fortunate) 47. Don't let the child go out because it's .................................... (wind) 48. My sister is fond of …………..places. (crowd)

Đoạn đường AB dài 200km . Cùng lúc 1 xe máy đi từ A và 1 ô tô đi từ B , xe máy và ô tô gặp nhau tại C và A 120 km. Nếu xe máy khởi hành sau ô tô 1 giờ thì gặp nhau tại D cách C 24km. Tính vận tốc ô tô và xe máy

REVIEW UNIT 12, 13, 14 – GRADE 8 I. Choose the best answer: 1. Angkor Wat is the largest ………………………………… in the world. A. city B. temple C. statue D. pyramid 2. She asked me ………………………………… I ate the cake on the table. A. what B. where C. if D. when 3. Millions of Christmas cards …………………………. every year. A. sent B. send C. are sent D. were sent 4. Santa Claus is based ……………………… the description of Saint Nicholas in the poem. A. on B. of C. in D. at 5. She …………… always ………………… difficult questions A. is / ask B. does/ ask C. does/ asking D. is/ asking 6. What about walking to school three times a week. A. Yes B. Good idea C. No D. Not yet 7. Today, we went on ………………………………… tour around the corner. A. three hours B. three- hour C. a three- hour D. a three- hours 8. The nice girl was ……………..…….. into the rock by my youngest sister. A. paint B. draw C. carve D. carved 9. Ba is very interested ……………………… English. a. of b. at c. on d. in 10.The Hanging Garderns of Babylon is one of the ……………………………… of the world. a. buildings b. wonders c. walls d. structures 11.Would you like …………………………… and stay with us while you are in town ? a. coming b. come c. to come d. came 12.This custom spread ……………………………….. Europe, and finally to America in the 1800s. a. in b. out c. of d. throughout 13.Let’s …………………………. a game. a. play b. to play c. playing d. played 14. The lava was pouring ………………………………… when we flew overhead. a. in b. out c. at d. on 15. I’ll…… you up at the hotel at 7:30, OK? a. pick b. get c. wake d. stand 16. I was cooking dinner in the kitchen when the phone .............. a. ring b. was ringing c. rang d. to ring 17. I don’t know how........... the song. a. to sing b. sing c. to sang d. singing 18. Your poem should..............in English. a. wrote b. write c. writing d. to write. 19. Millions of Christmas cards................every year. a. are sent b. are sending c. were sent d. send 20. My brother is always.................TV. a. watched b. watches c. to watch d. watching 21. I am ................. in the rice-cooking contest. a. interested b. interesting c. exciting d. excited 22. Last night, I............and...........a lot of books. a. go / buy b. went/ buy c. went/ bought d. go /bought 23. An English speaking contest............at Ngo Gia Tu school next month. a. was held b. was organized c. was written d. a & b 24. It is a custom to give presents at Christmas. a. tradition b. habit c. like c. paint 25. “...............to come and have dinner with us?” - “I’d love to.” a. Do you want b. Can you c. Would you like d. Would you mind 26. I was reading........... my mother was watching TV with my father. a. when b. while c. who d. which 27. 20 questions is a..................... a. game b. sport c. song d. guessing game 28. The Christmas carol is known all over the world. a. cake b. card c. song d. present 29. She bought a lots of……. during her vacation in the USA. a. cars b. b. tickets c. souvenirs d. schedules 30. The people are friendly and the …....... has been warm and sunny. a. meal b. accommodation c. visit d. weather

vì sao nói chính sách đồng hóa cac thời đại phong kiến trung quốc là chính sách thâm hiểm nhất

II. Read the passage carefully then answer the questions. People of ethnic minorities in Phu Yen celebrate Hoi Mua Festival every March. It is held to thank the Rice God for the crop, and to pray for better crops in the future. Families also worship their ancestors and parents on this occasion. Villagers voluntarily contribute money and other things to celebrate the festival. In this festival monks are invited to preach. People play drums, sing songs and dance. They also drink rice wine through a long thin bamboo tube. There are some other activities such as cultural shows, buffalo races, and traditional games. The festive atmosphere is felt around all the villages. Questions: 1. Who in Phu Yen celebrate Hoi Mua Festival every March? ……………………………………………………………………………………………………… 2. When is it held? …………………………………………………………………………………………………. 3. What do villagers voluntarily contribute to celebrate the festival? …………………………………………………………………………………………………. 4. Are monks invited play drums, sing songs and dance? ………………………………………………………………………………………….………. 5.Where is the festive atmosphere felt ? ……………………………………………………………………………………………….