Cho tam giác ABC có AB=9cm, điểm D thuộc cạnh AB sao cho AD=6cm.Kẻ DE song song với BC(E thuộc AB),kẻ EF song song với CD(F thuộc AB).Tính độ dài AE

Vẽ amine cung sư tử nhường miko nha ko spam chép mạng

giúp mk bài 2 với ạ cảm ơn

Ai jup mik vs mik đang cần gấp Bài 1: Bằng phương pháp hóa học hãy phân biệt các chất khí: C2H2, CH4, C2H4. (viết phản ứng hóa học xảy ra nếu có).

Bài 1: Viết PTHH xảy ra khi đốt lần lượt các chất sau trong khí Oxi: K; S; Zn; P; Ca; Fe; C; Zn; CH4; C2H6O; C4H10; C3H8O; C4H8O?

giúp mình với,mình đang cần gấp ,cảm ơn trc ạ.

Giúp mik nhà mn . Cảm ơn mm rát chi là nhiều nè 🙂🙂

Cho tam giác ABC vuông tại A, biết AB = 3cm , BC = 5 cm. Tính diện tích tam giác ABC.

. Đốt cháy 6,2 g phot pho (P) trong khí oxi , thu được 35,5 g điphotpho penta oxit ( P2O5 ) . Khối lượng khí oxi tham gia phản ứng là a 16g b 32g c 29,3g d41,7g

Chia độngtừtrongngoặcsaochothíchhợp. 1. Where’s Mary? She (listen) __________________ to a new CD in her room. 2. Don’t forget to take your umbrella with you today. You know it (be) _____________ the raining season now. 3. Jean always (learn) __________ English at this time every day but today she (not study) _______ at the moment. 4. What time _____________ (the meeting/ happen) tomorrow? I (not know) ___________________ it yet. I (wait) _________________ for the announcement. 5. Where _______ (you/live) since you moved from your old house? 6. Look! The sun (rise) __________ over the ocean. This is the most amazing scene I (ever/ see) ______________. 7. He (speak) _________ Japanese so well because He (come) ___________ from Japan. 8. ________ (you/ usually/ go) for Christmas or _________ (you/stay) at home? 9. Look! Your friend (hold) ___________ some roses. They (look) ____________ lovely. 10. _____________ (you/ finish) your assignment yet? No, I ________________. 11. My father usually (walk) __________ to work but now hw (drive) __________________ his car. 12. I (not think) _________ Mary (sleep) __________ because I can hear some noise from her room. 13. My grandparents (bring) ____________ me up since I was very small. 14. How long ____________ (Peter/ work) in his firm? 15. James (always/ complain) __________. It (be) ________ hard to please him. 16. I (just/ realize) _______ that there are only four weeks to the end of them. 17. This is the second time I (be) _____ to London. 18. Now the children (not want) _______ to go to sleep. They (prefer) ___________ their mother to tell them bedtime stories. 19. _____ (they. Want) a horror movie before? Yes, they (watch) __________ a plenty of such movies before. 20. Jim (cook) __________ so tired now. He (work) ______________________ non-stop since the morning.