diện tích toàn phần của hình lập phương có cạnh2cm

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Ở cây cà chua, gen D qui định quả đỏ trội hoàn toàn so với gen d quy định quả vàng. Xác định kết quả lai trong các trường hợp sau: 1. P: Quả đỏ x Quả vàng. 2. P: Quả đỏ x Quả đỏ.

tìm x biết: a)|x-1|=2x-5 b)|9-7x|=5x-3 8x-|4x+1|=x+2 |17x-5|-|17x-5|=0 |3x+4|=2|2x-9| c) |10x+7|<37 |x+3|-2x=|x-4|

I . Add tag questions to the following 1. The English don’t like tea , ……………………………….. ? 2. The rich usually live in big houses , ……………………………….. ? 3. There won’t be any good news for you , ……………………………….. ? 4. Joe used to be a lot faster than he is now , ……………………………….. ? 5. There used to be too much noise in this neighborhood , ……………………………….. ? 6. He has no chance of finding a cheap flat in the city centre , ………………………….. ? 7. He’s never met you before , ……………………………….. ? 8. They really went swimming when they were your age , ……………………………….. ? 9. Helen seldom smiles at me whenever she passes me in the street , ………………….? 0. He hardly ever makes a mistake , ……………………………….. ? 1. There’s scarcely enough time for our project , ……………………………….. ? 2. Cactuses need little water , ……………………………….. ? 3. Unfiendly people have few friends , ……………………………….. ? 4. It’s unpleasant to be alone in a strange country , ……………………………….. ? 5. It’s no good , ……………………………….. ? 6. No smoking is allowed in this compartment , ……………………………….. ? 7. We carried no cash with us , ……………………………….. ? 8. We have received no information yet , ……………………………….. ? 9. Not many people understand his ideas , ……………………………….. ? 10. Something is wrong with Jane today , ……………………………….. ? 11. Everything seems to be OK with you , Dad , ……………………………….. ? 12. Nothing matters , ……………………………….. ? 13. Nothing has been done about unemployment , ……………………………….. ? 14. Neither of them offered to help me , ……………………………….. ? 15. None of them wrote to him , ……………………………….. ? 16. Nobody is going to the mosque , ……………………………….. ? 17. Somebody has recognized you by your funny hat , ……………………………….. ? 18. Everyone was impressed by her beauty , ……………………………….. ? 19. One should always try to be friendly to the environment , ………………………….. ? 20. I’m not supposed to be here on time , ……………………………….. ? 21. I’m expected to do well in my schooling , ……………………………….. ? 22. Let’s go out for a meal together one day , ……………………………….. ? 23. Don’t be late , ……………………………….. ? 24. Help yourself to this soup , ……………………………….. ? 25. Pass me the salt , ……………………………….. ? 26. Don’t forget to keep in touch with us , ……………………………….. ? 27. Post this letter for me , ……………………………….. ? 28. Have some more coffee , ……………………………….. ? 29. Get out your books , ……………………………….. ? 30. Have a nice holiday , ……………………………….. ?

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Choose the letter A, B, C or D to complete the passage below Hi. We are from Neptune, the eighth planet from the Sun in the Solar System. Our planet is named (6) ___________ the Roman god of the sea. The climate here is very unfriendly, with a temperature of around -300 degrees Celsius, and the winds are very strong. Actually, we have a lot of storms here. Everything is freezing on the (7) ___________ of Neptune, so of course we don’t have liquid water. To be able to survive here, we have to build all of our cities underground, a hundred kilometers beneath the surface. Luckily, we don’t have Neptune-quakes!Our life here is very different from your life on earth. Because it’s extremely (8) ___________ underground, we have a very good lighting system on round the clock. Every day, we need only three hours for sleep, four hours for work, and the rest of the day we (9) ___________ on our leisure activities. So life is relaxing. Most of us like traveling to other planets for new experiences. Although we are (10) ___________ than you in size, we can move very fast. In fact, we have wings, so we can fly. Thus, we don’t suffer heavy traffic like on your earth. We don’t have oxygen either, but we live on hydrogen. 6:A. for B. in C. after D. to 7: A. system B. surface C. trace D. trek 8: A. dark B. bright B. good D. happy 9: A. explore B. spend C. have D. step 10: A. most big B. biggest C. bigger D. the bigger

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