mn ơi cho tớ hỏi , tại nguyên phân ,để tính số nst mà môi trường nội bào cung cấp tương đương với sô nst đơn là bao nhiêu thì dùng công thức a.2n(2^k-1) hay sao ạ ( lưu ý ở kì sau nha , tại tớ thấy kì sau có bộ nst 4n đơn í )

Vẽ bé mèo. NL:Ai nuôi bé mèo ko nek?Meooooooooooooooooooooo

tính nồng độ ion trong các dd : a, HNO, pH-4 b, H2SO4, pH-3 c, KOH, pH-9 d, Ba(OH)2, pH-10

chuyên gia tiếng anh giúp em vs khi lm ghi rõ công thức đầy đủ thiếu công thức báo mod xóa ráng chịu _____________________ ex2) cirle the best answer 11) My uncle's herd of cows (is / are) considered the best in the area 12) The Government (has / have) fallen and a general election will soon be held 13) The team ( is / are) trying on the new trainers 14) The pack of cards ( was / were) lying all over the drinking table 15) Whe the audience (has /have) kept silent the concert will begin 16) A team of plumbers ( was /were) playing against a team of carpenters 17) This class (is / are ) the best in the school 18) Many Hollywood stars ( walks / walk) gracefully on the red carpet 19) His fans ( scream / screams ) in excitement 20) Anne Hathaway and James Franco ( host / hosts) this year's Oscars

Exercise 1: Kết hợp câu dùng câu điều kiện 1. He can't go out because he has to study for his exam.  If ................................................................................................................................................................ 2. She is lazy so she can't pass the exam.  If ................................................................................................................................................................. 3. He smokes too much; that's why he can't get rid of his cough.  If ................................................................................................................................................................ 4. I can't play football this afternoon because I felt tired.  If ................................................................................................................................................................. 5. Olga and Ivan weren't paying attention, so they didn't see the sign marking their exit from the highway.  If ................................................................................................................................................................. 6. She can't be employed because she doesn't have a college degree.  If ................................................................................................................................................................. 7. She walked to the meeting. She was late.  If ................................................................................................................................................................ 8. Unless you promise to return back, I won't lend you.  If ................................................................................................................................................................ 9. We put off our trip because the weather was terrible.  If ................................................................................................................................................................ 10. Sally doesn't know what she has to do for homework because she was absent from school on Friday.  If .................................................................................................................................................................

Cho tam giác ABC có góc B = 60 độ . Vẽ phân giác BD. Từ A vẽ đường thẳng vuông góc với BD tại H và cắt BC tại E . Chứng minh : a) BD là trung trực của AE b) tam giác ABE đều c) Từ A kẻ đường thẳng song song với BD cắt đường thẳng BC tại F. Chứng minh tam giác BAF cân

She would rather (stay)______ at home *Giải thích nha !

Chứng minh rằng đường thẳng DF luôn đi qua một điểm cố định khi M thay đổi.

Làm hộ mình bài tính này với ạ Trình bày chi tiết nha

14. I rang the door bell, but no one seemed (be) …………………………… at home. 15. It was good of you (explain) …………………………… everything to me. B. Complete the sentences with the verbs in the correct form (gerund or to-infinitive). 1. Don't forget …………. your mother, (phone) 2. I love ……………….… on my own (be) 3. Do you want …………. tonight? (go out) 4. Would you like………….. to the beach this afternoon? (go) 5. I remembered…………………. all the doors but I forgot. …….. the lights, (lock/turn off) 6. Are you planning ………….. on holiday this year? (go) 7. He agreed ………….. me after I wrote him a letter, (see) 8. I enjoy………….. your letters very much, (read) 9. We like………….. here but we miss ………….. to our old friends, (live/talk) 10. I'd like………….. a job with a foreign company, (get) 11. I'm going to learn …………..Spanish before we go to Spain for our holidays next year, (speak) 12. Matthew suggested………….. for a meal but I wanted………….. at home, (go out/stay) 13. I don't like …………..violent films, (watch) 14. When I was a child, I hated………….. in the dark, (sleep) 15. She finished…………... the book but then she decided………….. another one. (write/start) 16. We're hoping…………..………….. the house next week, (finish/paint) 17. Do you miss………….. in the evenings now that you have children? (go/out) 18. I am hoping ………….. at the factory soon.(stop/work) 19. He's very mean - he never offers …………..for anything, (pay) 20. I tried ……………………..sugar in my tea but I didn't like it. (give up/take)