có ba lọ đựng khí oxi, khí nitơ và khí cacbonnic đc đậy kín . bằng phương pháp hóa học hãy nhận biết chất khí trong mỗi lọ . viết phương trình hóa học xảy ra ( nếu có )

d) Dân ta có một lòng nồng nàn yêu nước và tinh thần yêu nước ấy lại được thể hiện mạnh mẽ những lúc dân tộc ta gặp khó khăn, thách thứ<$> Vậy trong hoàn cảnh cả dân tộc ta đang tập trung mọi nguồn lực để chống dịch Covid-19 như hiện nay thì bản thân các em cần làm gì để thể hiện lòng yêu nước của mình. (trình bày bằng đoạn văn ngắn 10-12 dòng).

Giúp mình 2 bài ngắn này với. Đều là bài đốt cháy hidrocacbon.

làm hộ mình bài 37 dung dịch nhé khoa học lớp 5 trang 65 vở bài tập và chụp cho mình Sách giáo khoa bài 37 nhe cảm ơn nhiều hứa sẽ vote 5 *

Tam giác ABC vuông tại A , đường cao AH . cho biết CH = 6cm . độ dài đường cao AH là bao nhiêu nếu sinB = √3/2 a) 2cm b) 2√3 cm c) 4 cm d) 4√3 cm

I. Fill in the blank with a suitable word. “Do you like sport?” You can hear this (1) very often. Many people answer “yes, I do”, and (2) think about watching a game of football at a stadium, or (3) TV while sitting in a comfortable armchair. But watching sport events and going in for sport (4) two different things. Let‟s hope that you prefer the second. Sport holds (5) important place in our life. When you listen to the radio early in the morning, you can always (6) sports news. When you open a newspaper, you will always find (7) about some game or other or an article about your favourite kind of sport. Especially interesting stories are (8) famous men or women in the world of sport, how they became champions and about (9) plans for the futures. Television programmes about (10 ) are also very popular, and you can watch something interesting practically every day. II Complete the conversation with the words in the box. them played end score scored dear Pauline: You look tired. Owen: I am. I (1) football this morning. Pauline: What was the (2) ? Owen: 5-1 to (3) . Pauline: Oh (4) . Owen: It's not the (5) of the world. I (6) our goal. III. Match the questions and answers, and then write the answers in the blanks. 1. What's your favourite sport? a. No, not really. 2. Who's your favourite sportswoman ? b. Three or four times a week. 3. How often do you go swimming? c. She's a skier - but I can't think of her name right now. 4. What's your favourite football team? d. Liverpool. 5. Do you like volleyball? e. Running

Hệ quả của cách mạng công nghiệp là gì?

Cho biểu thức: A = 2+x/2-x-4x^2/x^2-4-2-x/2+x a) Tìm điều kiện xác định rồi rút gọn biểu thức A. b) Tìm x để A = - 3

Giải cho em câu 28 là đáp án nào ạ

I. Combine two sentences into one, using the connectives from the list: and, but, because, so, therefore, or, moreover, however, if, when, unless. 1. You can’t borrow my dictionary. You bring it back on Monday. ________________________________________________________________________ 2. The cost of installation is very high. Solar domestic heating systems are economical to use. ________________________________________________________________________ 3. Solar panels are placed on the roof of a house. The Sun’s energy is used to heat water. ________________________________________________________________________ 4. I don’t agree with a lot of his teaching methods. He is a good teacher. ________________________________________________________________________ 5. We’d better not waste water. We won’t have enough to drink sooner or later. ________________________________________________________________________ 6. The house is quite beautiful. The cost is not too high. ________________________________________________________________________ 7. Do you want to study more? Do you want to look for a job? ________________________________________________________________________ 8. You can go home. You’ve finished this exercise. ________________________________________________________________________ 9. I don’t get many opportunities to practise my English. I find it difficult to remember everything I study. ________________________________________________________________________ 10. I’m practising speaking English a lot. I don’t want to fail in the oral test. ________________________________________________________________________