Cho 4 số 1234 viết được bao nhiêu số có 3 chữ số khác nhau.

Exercise 3: Fill the gap 1.The books, ________ I'd ordered over the internet, took nearly three weeks to arrive. 2.The books _________ I'd ordered from a bookshop arrived the following week. 3.My parents, ________were born in the north of England, moved to London to find work. 4.The man ________ lives upstairs is always playing music when I'm trying to get to sleep. 5.The building __________I live in was built in the 9s. 6.The building __________ I live was built in the 9s. 7.The car's making a funny noise again,_______ means we'll have to get someone to look at it. 8.The employee to _________you refer is no longer working for this company. 9.Do you remember the name of the man __________car you crashed into? 10.Have you any idea _________they were arguing about? 11.The hotel ______we stayed was very good for the price. 12.The woman _________is sitting at the desk is Mr. Winter's secretary. 13.I cannot remember the reason _________he wanted us to leave. 14.Jane, ____________ mother is a physician, is very good at biology. 15.She didn’t see the snake _____was lying on the ground 16.Do you know the shop _______ Andrew picked me up? 17.That man is the writer _____________wrote a best- selling novel 18.Here is the CD ___________ you thought you had lost. 19.A professor is someone _______teaches in a university. 20.The only present _______I didn’t like was the gold belt. 21.A meteorologist is someone _________ knows about the weather. 22.This is the book __________I wrote to you about. 23.Anybody ____________ wants to join the drama society must sign up now. 24.This is the shop ______________ is so expensive. 25.Ciro´s was the best club _________ I have ever been to. 26.The tower _________ blew down in the storm was over years old. 27.The match _______ we saw was so boring. 28.Did I tell you about the people ____________________ live next door? 29.The horse _____________ won the race belongs to an Irish woman. 30.I love the ice cream __________ they sell in that shop.

Giúp em cả đề nha ai mà nhanh và đúng Thì em tick hết

Tìm M b. (x3 + 6x2 + 5y3) - M = (2x3 - 5x + 7y3) c. M - 5,7x2y - 3,1xy + 8y3= 6,9xy - 2,3x2y - 8y3

UNIT 3: COMMUNITY SERVICE I. Choose the words whose underlined part is pronounced differently from that of the others in each group 1. A. near B. learn C. dear D. clear 2. A. knocked B. needed C. founded D. wanted 3. A. volunteer B. collage C. community D. doctor 4. A. provide B. individual C. situation D. children 5. A. tutor B. student C. university D. discuss 6. A. cough B. laugh C. enough D. high 7. A. collect B. clean C. city D. cracker 8. A. blanket B. donate C. calorie D. allergy 9. A. laugh B. cough C. bought D. tough 10. A. game B. gym C. girl D. bag 11. A. calorie B. labour C. community D. volunteer 12. A. environmental B. benefit C. service D. sick 13. A. danced B. helped C. watched D. enjoyed 14. A. architect B. church C. children D. armchair 15. A. general B. garden C. go D. get 16. A. cancel B. ceiling C. calling D. cupboard 17. A. calories B. carve C. collage D. center 18. A. unique B. mosquito C. mosque D. question 19. A. camping B. recycle C. vacumm D. community 20. A. giant B. target C. figure D. garbage 21. A. chemist B. school C. chance D. chaos 22. A. frog B. drag C. page D. mug 23. A. kite B. cookie C. hike D. knit 24. A. volunteer B. committee C. guarantee D. degree 25. A. chemistry B. chemical C. charity D. mechanic 26. A. architect B. church C. childhood D. change 27. A. collage B. cave C. cycle D. cancel 28. A. child B. provide C. mind D. think 29. A. blanket B. calorie C. donate D. allergy 30. A. help B. benefit C. elderly D. garden 31. A. volunteer B. collage C. community D. doctor 32. A. provide B. individual C. situation D. children 33. A. tutor B. student C. university D. discuss 34. A. butter B. put C. sugar D. push 35. A. few B. new C. threw D. knew 36. A. pretty B. get C. send D. well 37. A. grew B. threw C. knew D. flew 38. A. close B. chose C. lose D. rose 39. A. cough B. laugh C. enough D. high 40. A. are B. fair C. there D. wear 41. A. reliable B. living C. revival D. final 42. A. hate B. play C. nation D. international 43. A. bead B. read C. dead D. recede 44. A. nature B. change C. gravity D. basis 45. A. discipline B. vision C. cylinder D. muscle 46. A. office B. promise C. service D. expertise 47. A. suitable B. biscuit C. guilty D. building 48. A. however B. vehicle C. helicopter D. ahead 49. A. wished B. produced C. performed D. liked 50. A. many B. parade C. great D. gravy

Ex 3: Reducing the relative clauses using V-ing, V3/ED, to V. 1.Neil Armstrong was the first man who walked on the moon …………………………………………………………. 2.I come from a city that is located in the southern part of the country. …………………………………………………………. 3.The children who attend that school receive a good education. ………………………………………………………. 4.The scientists who are researching the causes of cancer are making progress. ………………………………………………………. 5.They live in a house that was built in ………………………………………………………. 6.We have an apartment which overlooks the park. ………………………………………………………. 7.Yuri Gagarin became the first man who flied into space. ………………………………………………………. 8.We stood on the bridge which connects the two halves of the building. ………………………………………………………. 9.I come from a city which is located in the southern part of the country ………………………………………………………. 10.The vegetables which are sold in this supermarket are grown without chemicals. ………………………………………………………. 11.Do you know the woman who is coming toward us ? ………………………………………………………. 12.The people who was waiting for the bus in the rain are getting wet. ………………………………………………………. 13.I come from a city that is located in the southern part of the country. ………………………………………………………. 14.They live in a house that was built in ………………………………………………………. 15.He was the first man who left the burning building. ………………………………………………………. 16.The couple who live in the house next door are both college professors ………………………………………………………. 17.The people who are waiting for the bus in the rain are getting wet. ………………………………………………………. 18.The students who did not come to the class yesterday explain their absence to the teacher. ………………………………………………………. 19.Did you get the message which concerned the special meeting ? ………………………………………………………. 20.Lan is the second student who entered the classroom this morning. ………………………………………………………. 21.The psychologists who study the nature of sleep have made important discoveries. ………………………………………………………. 22.He was the only man who reached the top. ………………………………………………………. 23.He is always the first who comes and the last who goes. ………………………………………………………. 24.People who listen to very loud music may suffer gradual hearing loss. ………………………………………………………. 25.He was the second man who was saved in the fire. ………………………………………………………. 26.I haven’t got anything that I could open a bottle of wine with. ………………………………………………………. 27.The Queen Elizabeth is the largest ship which has been built on the island. ………………………………………………………. 28.The fifth man who was interviewed was completely unsuitable. ………………………………………………………. 29.This is the third who is late for the meeting today. ………………………………………………………. 30.Am I the next person who joins the interview ? ……………………………………………………….

Sắp xếp nào sau đây theo chiều tăng dần tính axit: A. HClO > HClO2 > HClO3 > HClO4​​B.HClO < HClO2 < HClO3 < HClO4 C. .HClO3 < HClO4 < HClO < HClO2 D. HClO3 > HClO4 > HClO > HClO2 ( cho hỏi tính axit tăng-giảm như nào ạ)

giúp mình nhanh với Trên cây rêu, cơ quan sinh sản nằm ở đâu ? * A. Mặt dưới của lá B. Trên phần ngọn C. Ở rễ D. Ở phần chồi nách Đặc điểm của thân dương xỉ là gì? * A. Thân phân nhánh B. Có thân biến dạng C. Thân rễ, hình trụ D. Thân chưa có mạch dẫn Dương xỉ sống ở đâu? * A. Nơi khô hạn B. Dưới nước C. Nơi đất ẩm, có bóng râm D. Đầm lầy Rêu sinh sản theo hình thức nào ? * A. Sinh sản bằng bào tử B. Sinh sản bằng hạt C. Sinh sản bằng hình thức phân đôi D. Sinh sản bằng hình thức nảy chồi Cây rêu con được tạo thành trực tiếp từ * A. Bào tử B. Túi bào tử C. Tế bào sinh dục cái D. Tế bào sinh dục đực So với tảo, rêu có đặc điểm nào ưu việt hơn ? * A. Có thân và lá chính thức B. Có rễ thật sự C. Thân đã có mạch dẫn D. Không phụ thuộc vào độ ẩm môi trường Cơ quan sinh sản của dương xỉ là: * A. Bào tử B. Túi bào tử C. Hạt D. Hoa Rêu thường sống ở * A. Dưới nước B. Trên cạn C. Nơi ẩm ướt D. Nơi khô hạn Khi nói về rêu, nhận định nào dưới đây là chính xác ? * A. Cấu tạo đơn bào B. Chưa có rễ chính thức C. Không có khả năng hút nước D. Thân đã có mạch dẫn Rêu khác với thực vật có hoa ở đặc điểm nào dưới đây ? * A. Thân, lá đã có mạch dẫn B. Chưa có rễ chính thức C. Đã có hoa D. Thân đã phân nhánh

căn cứ vào đâu Đảng ta khẳng định giáo dục - đào tạo là quốc sách hàng đầu ? phân tích những phương hướng của giáo dục và đào tạo ? cho ví dụ cụ thể của từng phương hướng

cho hình lập phương ABCD.A'B'C'D'. CM AC' vuông góc (BDA') hộ mình nhanh, thks mn. tym đầy đủ