Tìm Max P=$\frac{10}{2x+\sqrt{x}+2}$

1. Đất nước nào sau đây thuộc cả Châu Á và Châu Âu A. Hy Lạp B. Mông Cổ C. Nga D. Đài Loan 2. Đất nước nào sau đây có tỉ lệ béo phì cao nhất A. Jordan B. Iceland C. Nauru D. UAE 3. Đất nước nào sau đây không giáp với Trung Quốc A. Mông Cổ B. Việt Nam C. Myanmar D. Thái Lan 4. Quốc gia nào sau đây phần lớn là hoang mạc A. Dar es slaam B. Úc C. Burundi D. Ai Cập 5. Đất nước nào sau đây không giáp với Việt Nam A. Trung Quốc B. Lào C. Guam D. Campuchia 6. Tên thủ đô của Singapore là gì A Singapore B. Washington DC C. Bắc Kinh D. Manila 7. Đâu là tên 1 sân bay quân sự của Việt Nam A. Gia Lai B. Gia Đình C. Gia Lâm D. Gia động vật 8. Đâu là tên 1 thành phố tại Việt Nam A. Vinh B. Vịnh C. Vĩnh D. Vĩnh 9. Đất nước nào có nhiều hoa hậu nhất A. Thái Lan B. Ấn Độ C. Myanmar D. Venezuela 10. Singapore có bao nhiêu sân bay và tại sao Singapore không có chuyến bay nội địa

III. Chia động từ ở thì quá khứ hoặc quá khứ tiếp diễn 8. While Ted _______________ (shovel) snow from his driveway yesterday, his wife _________________ (bring) him a cup of hot chocolate. 9. John _________________ (have) a car accident last week. He __________________ (drive) down the street when suddenly a lorry __________________ (hit) his car from behind. 10. Ten years ago, the government _______________ (decide) to begin a food programme. At that time, many people in the rural areas _______________ (starve) due to several years of drought. 11. They ___________________(wait) for me when I _________________ at the station (arrive) 12. She ________________ (swim) in the sea when I ___________________ her (see) 13. ___________________they__________________(play) tennis when it _________________ raining (start)? 14. We __________________ (drive) home from the theatre when the police __________________(stop) us. 15. The wind __________________ (blow) very hard when I ________________(go) out this morning.

Cho hình chữ nhật ABCD có AB= 12cm; BC= 9cm.Gọi H là chân đường vuông góc kẻ từ A đến BD. a/ Chứng minh: tam giác AHB đồng dạng tam giác BCD b/Tính độ dài đoạn thẳng AH c/ Chứng minh: AH^2=HD.HB d/ BD.AH= AB.AD Giúp mình vứi T_T

Ex 4. 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. 9. My father ___________________ (watch) News in 60 Seconds every evening. 10. ___________________ (you/ ever/ meet) a famous football player? 11. Ten years ago, people ___________________ (not spend) as much time on screens as they do today. 12. Mr Gray ___________________ (teach) French here since 2015. 13. We ___________________ (fly) to Washington tomorrow afternoon. 14. Gustave Eiffel ___________________ (design) Eiffel Tower in 1889. 15. Someone ___________________ (knock) at the door. Can you see who it is? 16. I ___________________ (not play) basketball because I’m not tall enough. Ex 5 . Supply the correct form of the words in brackets. 1. I’m afraid I don’t find basketball very _______________. (interest) 2. He gets a lot of _______________ from football. (enjoy) 3. Is Delhi the most _______________ city on Earth? (pollute) 4. Who is the most famous fashion _______________ in Vietnam? (design) 5. Tourists like to visit _______________ buildings in Hoi An. (history) 6. Pelé is _______________ regarded as the best football player of all time. (wide) Ex 6. There is one mistake in each sentence. Find and correct it. 1. She have seen that film three times. 2. When did you came home yesterday? 3. My older brother can to play basketball, but I can’t. 4. Britain’s the most popular drink is tea. 5. I was not interested in that game show because it was bored. 6. Have you ever be to Paris?

Em hãy tả lại một cây hoa được trồng ở trường em

giúp mình với mn ơi rút gọn bthức

Viết đoạn văn cảm nhận về vua Quang Trung! ai làm hộ với ạ khoảng 12 câu thôi ạ

Ex 3. Choose the best answer (A, B, C or D). 1. I usually play football when I have . A. spare time B. good time C. no time D. times 2. In team sports, the two teams against each other in order to get the better score. A. are B. do C. make D. compete 3. draw on the walls and tables, please. A. Do B. Don’t C. Should D. Shouldn’t 4. Nam plays sports very often, so he looks very . A. sport B. sports C. sporty D. sporting 5. Last summer, I fishing with my uncle in the afternoon. A. go B. went C. goes D. going 6. Have you ever to London? A. be B. being C. been D. gone 7. People in Tokyo are very polite friendly. A. or B. and C. but D. so 8. Do you know drink in Viet Nam? A. popular B. more popular C. more and more popular D. the most popular 9. When we were in Stockholm, we had coffee and cakes a coffee shop the Old Town. A. on - on B. at - at C. in - in D. on - at 10. The Eiffel Tower is the most landmark in the world. A. visit B. visiting C. visited D. to visit 11. Super cars will water in the future. A. go by B. run at C. run on D. travel by 12. The robot will of the flowers in the garden. A. take care B. take note C. be careful D. carry 13. The house will have a super mart TV to the e-mails. A. send and post B. send and receive C. get and take D. receive and get 14. pencils and rapper, every student will have a computer. A. By B. Instead C. Instead of D. At 15. We might have a TV to watch TV programmes from space. A. wireless B. remote C. automatic D. local 16. My brother wants to become a to tell TV viewers what the weather is like. A. newspaper B. actor C. weatherman D. producer 17. TV can join in some game shows through telephone or by mail. A. people B. weatherman C. newsreaders D. viewers 18. are films by pictures, not real people and often for children. A. Documentaries B. Love stories C. Cartoons D. Detective stories 19. Are there any good programs teenagers on TV tonight? A. to B. for C. of D. with 20. My father works late tomorrow, so he will the first part of the film on VTV1. A. miss B. lose C. forget D. cut 21. Pelé was born ___________ October 21st, 1940. A. in B. on C.at D. by 22. Cartoons are not just ___________ kids anymore - many adults love watching cartoons too. A. with B. about C. to D. for 23. Breda goes jogging every morning to keep ___________. A. exercise B. trained C. fit D. health 24. We have a test on Monday, ___________ I will have to study this weekend. A. and B. but C. so D. because 25. Our team couldn’t win the championship, ___________ they played very well. A. so B. despite C. because D. although 26. Have you ever ___________ aerobics? Aerobic exercise can help you to lose weight. A. played B. done C. gone D. got 27. ___________ is a marathon in miles? ~ About 26 miles. A. How often B. How many C. How long D. How wide 28. The Statue of Liberty is one of the most famous ___________ in the United States. A. towers B. landmarks C. capitals D. cities 29. They showed a ___________ on global warming called ‘Warming Warning’. A. documentary B. romance C. comedy D. cartoon 30. ‘Can you give me the remote control on the table?’ ‘___________ Don’t you like this programme?’ A. Never mind. B. You’re welcome. C. Certainly. D. Really?

23. Make sentence using the words and phrases given. 1. Underwater robots/ dive/ longer/ deeper/ than/ human. ..................................................................................................................... 2. Robots/ become/ increasingly/ important/ investigate/ research/ hazardous/ dangerous/ environments. ..................................................................................................................... 3. Military robots/ be/ some/ most/ high-tech/ important/ robots/ used/ today. ..................................................................................................................... 4. Robots/ be able to/ think/ like/ humans. ..................................................................................................................... 5. Future/ robots/ be able to/ do/ more/ complicated/ things/ us. ..................................................................................................................... 6. Nowadays/ robots/ not/ talk/ people/ but/ future/ I/ think/ they/ will. ..................................................................................................................... 7. More/ people/ lose/ jobs/ because/ robots/ replace/. ..................................................................................................................... 8. One/ advantages/ robots/ be/ they/ can/ work/ situations/ dangerous/ harmfull/ humans. ..................................................................................................................... 9. Worker robots/ become/ more/ popular/ industries. ...................................................................................................................... 10. Robodex/ be/ largest/ robot/ exhibition/ world. ......................................................................................................................