Cho các chất $KMnO_{4}$ và $H_{2}O$. a. Viết phương trình hóa học các phản ứng điều chế Oxi từ mỗi chất trên. b. Lấy mỗi chất với khối lượng như nhau. Trường hợp nào sinh ra nhiều khí oxi hơn ?

1 ví dụ anh(chị) đã sử dụng phương pháp, kĩ thuật dạy học tích cực đạt hiệu quả trong dạy và học môn Mĩ thuật.

cấp cuuwsuuuuuuuuuuuuuuuuuuuuu mng oiiiii

Xác định thể tích dung dịch NaOH 0,8M và thể tích dung dịch NaOH 0,2M cần dùng để pha được 400ml dung dịch NaOH 0,5M ( mn giải cách mà không dùng sơ đồ chéo nha mn )

Tìm nghiệm của các đa thức sau :

Exercise 1 1. Detroit is renowned for the………….. of cars. PRODUCE 2. If you make a good……………… at the interview, you will get the job. IMPRESS 3. Teaching and medicine are more than…………………., they're professions. OCCUPY 4. My history teacher has a vast…………………. of past events. KNOW 5. You are never too old to go to college and gain some……………. QUALIFY 6. My greatest…………….. was graduating from the university. ACHIEVE 7. The weatherman said there is a strong…………… of rain today. POSSIBLE 8. Some old laws are no longer……………….. EFFECT 9. Athens is…………………. for its ancient buildings. FAME 10. He was caught shoplifting so now he has a……………….. record. CRIME 11. Despite her severe………….., she fulfilled her goals in life. DISABLE 12. Being……………. is the worst thing that can happen to someone. EMPLOY 13. If you buy presents in the summer your…………………… can be very high. SAVE 14. Due to the pilot's…………………, the copilot managed to land safely. GUIDE 15. It's important to also see the less………………… sides of the job. DESIRE 16. I was surprised at his………………… to give up. REFUSE 17. Children are by nature………………….. of danger. AWARE 18. She is always……………. towards her parents. RESPECT 19. The hospital has the best medical……………. and fast ambulances. EQUIP 20. You can relax in the comfortable………………….. of the hotel. SURROUND 21. The…………………….. looked dark and there were hardly any other guests. ENTER 22. Artists must be…………………., otherwise they just repeat what they see or hear. CREATE 23. Why are you so……………… of his work? He's just doing his best. CRITIC 24. Have you made up your mind? We need to know your ……………as soon as possible. DECIDE 25. He's too shy to look people …………………… when he talks to them. DIRECT 26. Have they put the Christmas………………….. yet? DECORATE 27. They put too many unnecesary ……………………… in food. ADD 28. I ……………… think that there's no point in arguing with him. Just ignore him. HONEST 29. Extraterrestrial life has not been…………………. proved yet. SCIENCE 30. Why don't you call the …………………. if the lights don't work? ELECTRIC 31. Music and television are forms of………………… ENTERTAIN 32. The concert didn't live up to our………………… EXPECT 33. The electric company admitted their ………………… for the blackout. RESPOND 34. Did you use to have …………………… as a child? ALLOW 35. I don't like those trousers, no matter how …………………….. they are. FASHION 36. Life ……………….. varies according to country and gender. EXPECT Cần gấp ạ !!!!

Hãy tạo số 49 từ số 1 và các phép tính +2, +3, +5, x2, x3, x5 Note: Có thể không dùng hết các phép tính và mỗi phép tính chỉ dùng 1 lần

Tìm GTLN: A=-3x^2+x-7 B=-2x^2+y-5y+x+11 giúp mik với hứa 5 sao và CTLHN nếu đúng

Liên kết câu xảy ra giữa 2 câu ? trong một câu ? hay cả hai ?

Khi nào $\pi=3,14$ và $\pi=180$