cho tam giác ABC vuông tại A, gọi AD là đường phân giác của góc BAC; AE là đường phân giác góc ngoài của tam giác ABC tại đỉnh A. C/m $\dfrac{1}{AB^2}$ + $\dfrac{1}{AC^2}$ + $\dfrac{1}{AD^2}$ + $\dfrac{1}{AE^2}$

Tìm hiểu về truyền kì mạn lục của Nguyễn dữ

giúp t câu 4,6,7 nha. cám ơn mng nhiều :))

. Circle the letter of the correct answer. 1. Mai has long black hair. a. Mai’s hair are black and long c. Mai’s hair is long black b. Mai has hair long and black d. There is long and black hair in Mai 2. There are twenty-five girls in my class. a. My class have twenty-five girls c. My class are twenty-five students b. My class has twenty-five girls d. My class has twenty-five girls 3. This girl is tall. a. This is tall girl c. This is girl tall b. This is a tall girl d. This is a girl tall 4. There is a well in front of my house. a. In front of my house has a well c. My house behind a well b. My house is behind a well d. My house is beside a well 5. Are there four people in your family? a. Your family has four people c. Does your family have four people b. Is your family having four people d. Do your family have four peo

viết đoạn văn trình bày suy nghĩ của e về DƯỢNG HƯƠNG THƯ dựa vàodàn ý trong hinh

Hòa tan hoàn toàn 1,64 gam hỗn hợp A1 gồm Al và Fe trong 250 ml dd HCl 1M thu đc dd A2. Thêm 100g dd NaOH 12% vào A2, pứ xảy ra hoàn toàn, lọc lấy kết tủa và đem nung trong kk đến KL không đổi thu đc 0,8 gam chất rắn. Tính % khối lượng mỗi KL trong A1

Bài 1. Chia động từ dưới đây ở thì HTĐ hoặc HTTD 1. Where ___________you (live)____________? I (live)______________in Hai Duong town. 2. What _______________he (do) ______________now? He (water)___________flowers in the garden. 3. What _______________she (do)_____________? She (be)______________a teacher. 4. Where _________________you (be) from? 5. At the moment, my sisters (play) ____________ volleyball and my brother (play) ______________soccer. 6. It is 9.00; my family (watch)___________________TV. 7. In the summer, I usually (go) ______________ to the park with my friends, and in the spring, we (have) ___________Tet Holiday; I (be) _______ happy because I always (visit) ___________ my grandparents. 8. ____________your father (go)_____________to work by bus? 9. How ___________your sister (go)___________to school? 10. What time _____________they (get up)_________________? 11. What ____________they (do)________________in the winter? 12. Today, we (have)______________English class. 13. Her favourite subject (be)__________________English. 14. Now, my brother (like)_________________eating bananas. 15. Look! A man (call)_________________you. 16. Keep silent! I (listen)____________________to the radio. 17. ______________ you (play)_________________badminton now? 18. Every day, my father (get up)___________ at 5.00 a.m, but today, he (get up) _________ at 6.00 am. 19. Every morning, I (watch)___________TV at 10.00, but today I (Listen) _____________ to music at 10.00. 20. Every day, I (go) __________to school by bike but today I (go)___________ to school by motorbike. 21. Every morning, my father (have) ______________a cup of coffee but today he (drink)____________milk. 22. At the moment, I(read)_______________a book and my brother (watch)_______ TV. 23. Hoa (live)________________in Hanoi, and Ha (live)________________in HCM City. 24. Hung and his friend (play)_______________badminton. 25. They usually (get up)___________________at 6.00 in the morning. 26. Ha never (go)______________fishing in the winter but she always (do)_____________ it in the summer. 27. My teacher (tell)__________________Hoa about Math. 28. There (be)____________________ animals in the circus. 29. _______________he (watch)______________TV at 7.00 every morning? 30. What _____________she (do) _________________at 7.00 am? 31. How old _________she (be)? 32. How ___________she (be)? 33. My children (go)________________to school by bike. 34. We (go)_______________to supermarket to buy some food. 35. Mr. Hien (go)________________on business to Hanoi every month. 36. Ha (like)______________coffee very much, but I (not like)______________it. 37. She (like)________________Tea, but she (not like)____________________coffee. 38. I (love)_______________ cats, but I (not love)__________________dogs. 39. Every day, I (go)______________to school on foot, but today I (go)________________to school by bike. 40. ______you ______________(wait) for, Nam? No, I ____________________(wait) for Mr. Hai. 41. My sister (get)______________ dressed and (brush)_______________her teeth herself at 6.30 everyday 42. Mrs. Smith (not live)____________in downtown. She (rent)___________in an apartment in the suburb. 43. How _________your children (go)_________________to school everyday? 44. It's 9 o'clock in the morning. Lien (be)________in her room. She(listen)_______________to music. 45. We____________________(play) soccer in the yard now. 46. My father (go)___________ to work by bike. Sometimes he (walk)______________. 47. _________You (live)________near a market? _ ____It (be)____________noisy? 48. Now I (do)_____________the cooking while Hoa (listen)_______________to music. viết đáp án thôi nha

Giúp mình với mình đang cần gấp.

em hãy viết đoạn khoảng một 2/3 trang giấy thi trình bày suy nghĩ của em về tình yêu thương

Đề bài : Hai số tự nhiên có tổng bằng 2013 và giữa chúng có 20 số tự nhiên khác Tìm 2 số đó. Mong đc sự giúp đỡ từ mn ạ Nhanh lên mn nhé Sáng mai em phải nộp bài rồi