Mọi người giải dùm em được không ạ? Câu này từng làm nhưng lỡ quên ạ :(
Câu 8: Qua 4 điểm cho trước trong đó không có ba điểm nào thẳng hàng. Hỏi vẽ được bao nhiêu tam giác có các đỉnh là 3 trong 4 điểm đó: A. 3 tam giác B. 4 tam giác C. 5 tam giác D. 6 tam giác.
Nhờ mọi người giải giúp em với ạ em cảm ơn ạ
Tìm các số tự nhiên a và b biết: `a, 2^a+124=5^b` `b, 10^a+168=b^2` `c, 3^a+9^b=183` `d, 5^a+323=n^2` `e, 2^a+342=7^b` `f, 2^n+80=3^b`
Ai giúp mình vs mình cần gấp ạ Xin cảm ơn ạ
Giúp mình với ạ!!! Cám ơn mn nhiều
21. They ……..since 8 o’clock. A. are talking B. have been talking C. talk D. talked 22. My brother ………in the army from 1990 to 1995. A. served B. has served C. had served D. is serving 23. At this moment, I ……..that we have a good chance of victory. A. was feeling B. am feeling C. feel D. had been feeling 24. I ……..the money from him yet. A. will receive B. haven’t received C. don’t receive D .am receiving 25. It rained while I ………well. A. was sleeping B. have slept C. had slept D. slept 26. I ……..him ten days ago. A. see B. saw C. have seen D. will see 27. I………you for a long time. A. didn’t see B. haven’t seen C. doesn’t see D. hadn’t seen 28. She ……..so hard that she doesn’t have time to go to the hairdresser’s. A. works B. worked C. has been working D. had worked 29. Mr. Johnson ……….to Los Angeles in 1992 A. had gone B. has gone C. went D. was going 30. What …………….to you yesterday? A. happened B. did happen C. had happened D. has happened 31. The boys broke a window when they ………….football. A. played B. were playing C. had played D. are playing 32. I never go to Australia. I ……..to Australia yet. A. will go B. went C. haven’t been D. have been 33. What ………do at 7:oo tomorrow morning? A. will you B. shall you C. were you D. did you 34. My brother ……..in this factory since 1990. A. works B. worked C. has worked D. had worked 35. Alice ………for Washington as soon as she had finished her exam. A. will leave B. would leave C. leaves D. left 36. He died after he ………ill for a long time. A. was B. had been C. has been D. is 37. I ……about him when he suddenly came in. A. talk B. talked C. am talking D. was talking 38. He will finish this work before you ………here tomorrow. A. leave B. will leave C. would leave D. are going to leave 39. While I was going to school yesterday, I ………..him. A. meet B. met C. will meet D. am meeting 40. Please don’t touch anything before the police………. A. will come B. comes C. come D. would come 41. Don’t make noise. My mother ………with her friends. A. is talking B. was talking C. talks D. talked 42. He…….in this office for ten years by next month. A. will have been working B. would be working C. will work D. will be working 43. George ………this film three times. A. sees B. has seen C. saw D. has seen 44. He doesn’t smoke while he ………a car. A. drives B. drove C. was driving D. is driving 45. They went out for a walk after they ………….their dinner. A. had B. have had C. had had D. were having
I.Điền a / an / some / any vào chỗ trống: 1. There is ....a..... banana in the basket. 2. I need ....tea. 3. Are there ..................tomatoes in the fridge? 4. We have .........rice, but we don't have ......meat. 5. There's ..................orange on the table. 6. I'd like ..................apple juice. 7. He has ............TV and ............computer. 8. Would you like ..................ice- cream? 9. I have............... friends in Hue. 10. Do you have ...............dogs or cats at home? 11. Would you like ..................cup of tea? 12. I would like.................. cakes, please. 13. Can I have ............glass of milk? 14. Thank you. And .........box of chocolates would be fine. 15. I don't have ............... paper. 16. Is there ............... petrol in the car? 17. I buy .......fruit, but I don't have ….vegetables. 18. Do you have ............... stamps? I need two. 19. I need ...............butter to make a cake. 20. I don't have ...............free time today. Sorry. 21. Are there............... potatoes in the basket? 22. There is ...............ink-pot on the table. giúp mình với mình đang gấp
Em hãy trình bầy nguyên nhân, thủ phạm, tính chất của chiến tranh thế giới thứ hai (1939-1945). Những chuyển biến nào được tạo ra khi chiến tranh thế giới thứ hai kết thúc? Những bài học nào được rút ra từ chiến tranh thế giới thứ hai?
lm đầy đủ giúp mik vs nhé thank
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