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2 năm trước
Cho tam giác ABC nhọn (AB<AC) nội tiếp đường tròn (O) , các đường cao AD , BE và CF cắt nhau tại H . Hai đường thẳng EF và BC cắt nhau tại M .Đường thẳng qua B và song song vớ AC cắt AM , AH lần lượt tại I , K Chứng minh : HI=HK
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1 Which activities do you often do to keep fit ? I often fast to keep fit 2. How often do you do exercise in the morning? 3. How many hours a night do you sleep ? .About 6 hours 4. What's your typical working day? I have to go to school every day 5. How do you spend your free time? Are you getting much exercise ? I usually go shopping and read books. Yes, 6. Where do you normally go on holiday ? I go home. Are you planning your holidays for this year ? / 7. What do you think about health and happiness ? 8. What will you do when you've got a headache? 9. What is your ambition? 10. How important are sport and sports people in your country ? Do any of them look like or behave like pop or film stars ? 11. Do people in your country use animals for transport and sport ? 12. What is your biggest achievement in life so far ? 13. What is your biggest challenge in the future ? 14. Is there any kind of risky or risky activity you would like to try in the future ? 15. Do you think recycling is the best solution of environmental pollution ? Can you think of other solutions ? 16. Are there any places in your country where there is a lot of rubbish ? 17. How can you stop people littering ? 18. Can you name some types of celebration in your country ? 19. How do people celebrate birthday in your country ? 20. What is the most important or popular musical instrument in your country ? 21. What is the most common musical instrument that people play in your country ? 22. What is an important symbol of your culture ? Does it have a special type of music ? 23. Do you think symbols are important for a country or culture ? Why ? / why not ?

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