Câu 3. Lập các PTHH sau và cho biết phản ứng nào là phản ứng phân hủy? Phản ứng nào là phản ứng hóa hợp? a. KClO3 KCl + ..................... b. CaCO3 .............. + CO2 c. ................ + O2  Fe3O4 d. H2 + .............  H2O e . P + O2  ............................ f. Na + .................  Na2O i. .................... K2MnO4 + …….. + ………………. k. S + …………….. SO2

Câu 2. Cho các oxit sau: K2O, CuO, SO2, CO2, Fe2O3, FeO, N2O5, P2O5, Na2O, MgO, Al2O3. Cho biết: a, Chất nào là oxit axit, oxit bazo? Gọi tên các oxit đó? b, Viết CTHH của các axit hoặc bazo tương ứng với các oxit trên?

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16. The runners from Jamaica won the …………..(COMPETE) 17. I lead an ………..lifestyle. I work out at least three times a week (ACT) 18. TNT is a highly ………….substance (EXPLODE) 19. The food here is ……………. Almost everyone can afford it (EXPENSIVE) 20. The company manager will have to make a …………..at the beginning of next week (DECIDE) 21. He is respected because of his …………..to other people. (KIND) 22. Everyone who knows him admires his ……….(GENEROUS) 23. I would like to make a ………….about the room service in this hotel (COMPLAIN) 24. He can never wait, He's always so ……….. (PATIENT) 25. Playing golf and meeting other people has been …………..to my career (BENEFIT) 26. The Internet has made ………….between distant parts of the world easier (COMMUNICATE) 27. Marty is a very …………boy. He never risks anything (SENSE)

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Part 3. Write the questions for the underlined words.(2,0 mark) 1. Gatsby is the main character of the film. ………………………………………………………………………………………… 2.The film is broadcast twice a week. ………………………………………………………………………………………… 3. Cartoon is my favourite kind of films. ………………………………………………………………………………………… 4. The film ends at 11 pm. …………………………………………………………………………………………

rút gọn phân số : 2020.2020+3030/2021.2021-1011

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cho hệ phương trình $\left \{ {{2mx+3y=5} \atop {(m+1)x+y=2}} \right.$ tìm m để hệ có nghiệm duy nhất (x,y) thõa mãn A= $x^{2}$ +$y^{2}$ đạt giá trị nhỏ nhất Biết hệ có nghiệm duy nhất khi m $\neq$ 3 và x= $\frac{1}{x+3}$ ; y= $\frac{m+5}{m+3}$

1. He completed the report with the ………….of his personal secretary. (ASSIST) 2. Very few countries still have forms of corporal ………….in their laws. (PUNISH) 3. Please write all the relevant information into this …………..form. (APPLY) 4. My first attempt to ride a motorcycle ended in …………(FAIL). 5. We have some brand new ………….in our club (EQUIP) . 6. The …………of the mayor calling an early election is quite slim (LIKELY). 7. After retiring I decided to take up ……………as a new hobby. (PHOTOGRAPH) 8. Some young people today don't really care about their …………..(APPEAR). 9. Dad has made a huge profit from …………..his house (SELL) . 10. ……………is the most useful form of energy (ELECTRIC) . 11. She came in too late because of a …………… (UNDERSTAND). 12. Children's books contain very beautiful ……………. (ILLUSTRATE) 13. I happen to know a lot of ………people (FAME). 14. He felt …………..when he saw the results of the test (RELIEVE) 15. The tree grew to a ………….of over 20 metres (HIGH)