Giup mình bài này với Một vị phụ huynh học sinh hỏi thầy giáo: "Thưa thầy, trong lớp có bao nhiêu học sinh?" Thầy cười và trả lời:"Nếu có thêm một số trẻ em bằng số hiện có và thêm một nửa số đó, rồi lại thêm 1/4 số đó, rồi cả thêm con của quý vị (một lần nữa) thì sẽ vừa tròn 100". Hỏi lớp có bao nhiêu học sinh?

cho tam giác ABC vuôgn góc tại A có góc B = 60 độ, BC=6cm, đường cao AH a, trên tia đối của tia BA lấy điểm D sao cho BD=BC chứng minh AB/BD=AC/CD b, từ A kẻ đường thẳng song song với phân giác của góc CBD cắt CD tại K chứng minh 1/KD.KC=1/AC^2 + 1/AD^2

Tìm các chữ số abc biết : abc+ acb=bca

Dịch nghĩa giúp mình với. Mình cảm ơn ạ. 1. Compare to/ with : 2. Concentrate on: 3. Consist of : 4. Contribute to : 5. Cool down: 6. Cool off: 7. Correspond to/ with: 8. Count down : 9. count on: 10. Count out: 11. cross out: 12. cry out (in/with sth): 13. Cry out for (usually used in progressive form): 14. cut down (sth/on sth) 15. cut off ((be / get) cut off; cut off sb / sth; cut sb/sth off ) (1): ( 16. cut off ( from sth / sb ) (2): 17. date back (date back to…): 18. . date from (date from…): 19. deal with (deal with sth/sbd) (=attend to): 20. decide against (decide against sbd/sth): 21. decide on (decide on sth/ sbd) (=settle on): 22. depend on (1) (depend on sth): 23. depend on (2) (depend on sb/ sth) (depend on sb/ sth to do sth) (=count on, rely on, bank on): 24. describe as (describe somebody/something as something): 25. deter from (deter sbd from doing sth) (=put off): 26. devote to (devote sth to sth): 27. die away: 28. die down: 29. die from/of sth (die of/from hunger/cancer/a heart attack/injuries): 30. die for/dying for (be dying for sth): 31. die off: 32. die out: 33. dip into: (dip into sth): 34. dispose of (dispose of sth) (=throw away/out): 35. divide s.t into s.t:

III. Choose one word or phrase marked A, B, C, or D that best complete the preceding sentence 1. He was too scare__________ me what he really thought. A.tell B. telling C. to tell D. told 2. These boys were punished__________ they went to school late. A.in spite of B. as if C. even though D. because 3. They were sacked__________ their carelessness. A.because B. because of C. although D. despite 4. Will you be kind__________ to help me? A.enough B. too C. so D. such 5. It was__________ that we went for a hike in the mountains. A.so a nice day B. so nice day C. such nice day D. such a nice day 6. Julie is not__________ to see this film. A.as old enough B. enough old C. enough old as D. old enough 7. __________ I meet her, she always wears a blue dress. A.Whatever B. However C. Whoever D. Whenever 8. The film was__________ through. A.too long for us to see B. very long for us to see it C.too long for us seeing it D. too long enough for us to see 9. Some workers are so poor that they don’t want to quit their job _______ they are ill-treated A. as though B. since C. although D. if 10. He turned off the lights before going out__________ waste electricity. A. so that not B. as not to C. in order that not D. so as not to 11. The school boys are in hurry__________ they will not be late for school. A. so as to B. to C. in order that D. for 12. He__________ I was scared. A. drove too fast that B. drove so fastly that C. drove so fast that D. drove such fast that 13. She dances__________ everybody adores her. A. such beautifully that B. so beautiful that C. too beautifully that D. so beautifully that 14. __________ to go to the cinema. A. It was late so that B. That it was late C. It was too late D. Such too late 15. We don’t _____to go there now. A. have time enough B. enough time C. have too time D. have enough time 16. I don’t think our daughter is__________ to understand this matter. A. too young B. is such young C. not enough young D. not age enough 17. Mrs. Harrison is__________ he owns many palaces. A. so a rich man that B. such an rich man that C. such a rich man that D. that so rich man a 18. He just had to apologize__________ he knew he had made a mistake. A. before B. wherever C. due to D. because 19. I often feel tired__________ I get up in the morning. A. although B. so long as C. when D. while 20. No sooner had he come__________ he knew he had dropped his wallet. A. when B. after C. than D. then

vẽ mầm cute Cho mik hỏi kí hiệu hoá học của nước là gì ạ(dạo này hok nhiều quá lú r)

Help me Nhanh nhéhdndbjsbdbdhdd

Em cần gấp ạ, hứa sẽ vote nếu song sớm

Bài tập: tìm chỉ từ trong đoạn văn 1 và 2 của bài “Cổng trường mở ra”

9.I find English interesting. → I am ………………………………………..… 10.Our roof will be fixed tomorrow. → They…………………………………….. 11.They will show flying cars to the public when they finish it. ® Flying cars …………………………………………………………………….. 12.They will install solar panels on the roof of our house next week. ® Solar panels ……………………………………………………………… 13.We will be using biogas for cooking and heating at this time next month. ® Biogas ………………………………………………………………………………... 14.People won’t burn fossil fuels for energy in the future. ® Fossil fuels ………………………………………………………………… 15. New York has more billionaires than Tokyo. (FEWER) ® ………………………………………………………………………………………. 16. A group of foreigners visited the slums last week, didn’t they? (VISIT) ® ………………………………………………………………………………………. 17. The countryside doesn’t suffer as much pollution as the city. (LESS) ® ………………………………………………………………………………………. 18. Jakarta doesn’t have as many skyscrapers as Shanghai. (MORE) ® ………………………………………………………………………………………. 19. Let’s go to the school cafeteria. (ABOUT) ® ……………………………………………………………………………………….