Cho tam giac ABC co ba goc nhon, duong cao BD, CE cat nhau tai H. a)Chung minh: AE.AB = AD.AC b)Chung minh: goc ABC bu voi goc CDE HELP CÂU B

Vẽ đậu mầm cute. NL: Kể tên cho mình một số app vẽ cho người mới học vẽ

Vẽ anime đôi nam nữ, ko cần vẽ mặt, nam đeo kính, nữ tóc ngắn, full line. Nếu dc thì vẽ thẻ nữ đang cầm quyển sách ạ.

Mn ơi, giúp mình với Mik hứa vote 5* và ctlhn ---------------------------------------------------------------------------------------------- Đề: Tìm thương của hai số biết thương đó gấp 2 lần số bé nhưng chỉ bằng nửa số lớn.

Đốt cháy hoàn toàn este X thu được CO2 và H2O có tỉ lệ khối lượng tương ứng 22 : 9. Mặt khác đun nóng 9,0 gam X với dung dịch NaOH vừa đủ, thu được muối Y và ancol Z. Chuyển hóa toàn bộ Z thành anđehit, rồi cho tác dụng với dung dịch AgNO3/NH3 (dùng dư) thu được 64,8 gam Ag. Tên gọi của X là

V. Read the passage, and then decide whether the statements that follow are True (T) or False (F). In my opinion, using the computer as your hobby can be harmful to both your health and your social life. Firstly, sitting all day in front of the computer can cause health problems such as eye-tiredness and obesity. Secondly you may get irritated easily. Besides, if you use the computer too much, you will not have time for your family and friends. In short, computers should only be used for a limited time. 1. Using the computer too much can make your eyes tired. 1. _______ 2. Using the computer too much is not good for you. 2._______ 3. We still can spend a lot of time with our family and friends. 3. _______ 4. According to the writer, we can use the computer for a long time. 4._______ 5. Computers should only be used for a limited time. 5. _______

X. Rewrite the sentences without changing the meanings. 1. The garden is behind Nam's classroom. Nam's classroom........................................................................... 2. There are four people in her family. Her family.................................................................................. 3. My house is behind the hotel. The hotel..................................................................................... 4. My room is smaller than your room. Your room.................................................................................... 5. No house in the street is older than this house. This house.................................................................................... 6. My house has four floors. There......................................................................................... 7. My school has six hundred students. There....................................................................................... 8. The Red River is 1,200 kilometers long.The Nile River is 6,437 kilometers long The Nile River is much ....................................................... 9. Mr Pike's nationality is Australian. Mr Pike comes..................................................................... 10. What is the age of Peter? How.....................................................................................?

VI. Write sentences with the cues given. (hoàn thành câu dựa vào những từ gợi ý) 1. Peter/ prefer/ play/ computer games/ in his free time. ______________________________________________________________________________ 2. You/ hate/ do/ the washing? _ 3. My father/ enjoy/ play/ sports/ and/ read/ books. _________________________________ 4. The teacher/ not mind/ help/ you/ with difficult exercises. ___ 5. Mr.Smith/ love/ go/ shopping/ at weekend. ______________________________________________________________________________

40. _................ drop that mobile phone and do your homework? A. Why don’t you B. How about C. Would you mind D. When did you 41. The Hmong of Sa Pa are called Black Hmong ................ their mainly black clothing. A. because of B. in spite of C. in order to D. according to 42. People in rural areas live ................ than those in cities. A. simplier B. more simply C. more simple D. simpler 43. The highlands of northern Vietnam are home to the 1.5 million-strong Tay, ................_ minority group. A. Vietnam’s largest B. the Vietnam’s largest C. a Vietnam’s largest D. the largest Vietnam 44. ................ is the Nung’s clothing? ~ Indigo. A. What B. Which group C. What colour D. Whose

cho 0,048 l khí CO2 ở đktc tác dụng với 200g dung dịch NaOH . Biết sản phẩm tạo thành Na2CO3 và h20 a) Tính nồng độ phần trăm của Naoh b) tính nồng độ phần trăm của dung dịch sau phản ứng