dùng khí H2 để khử 44,6g PBO thể tích khí H2 điều kiện tiêu chuẩn cần dung là gì

Hoạt động 2 :Em hãy xem hình 28.1 ( SGK Tr 103) xác định vị trí cao nguyên Kon Tum, Plây -Ku, Đak- lak, Di Linh?

Vào nửa cuối thế kỉ XIX một số quan lại, sĩ phu yêu nước đã mạnh dạn đề nghị gì với nhà nước phong kiến? A: Đổi mới chính sách đối ngoại. B: Đổi mới công việc nội trị, ngoại giao, kinh tế, văn hoá. C: Đổi mới nền kinh tế, văn hoá. D: Đổi mới công việc nội trị

tìm giá trị nhỏ nhất của √x +6 / √x +2

1. Một vật có khối lượng 400g được thả rơi tự do từ độ cao 20m so với mặt đất.Cho g=10 m/s2. Sau khi rơi dc 12m động năng của vạt bằng 2.hai xe gòng chở than cùng chuyển động trên 2 tuyến đường ray song song nhau với wđ1 = 1/7 wđ2 . Nếu xe 1 giảm vận tốc đi 3m/s thì wđ 1= wđ 2 .Tìm vận tốc v1 , v2

Câu 7: Cây thuộc hạt trần có những đặc điểm chủ yếu nào ? A. Cây thân gỗ , lá hình kim , hoặc hình vây nhỏ , trên ngọn có nón B. Cây thân gỗ , có cấu tạo phức tạp C.Lá cây xanh , chưa có hoa và quả D. Cả A,B và C đều đúng

Giúp mình với làm bài này với nha

II. Choose the best item among A,B,C or D to complete the sentences. 1. I ______ very happy yesterday. A. wasn’t B. didn’t be C. weren’t D. am not 2. Last summer, I ________ fishing with my uncle in the afternoon. A. go B. went C. goes D. going 3. _____ they _____ the volleyball game yesterday?. A.Were/win B. Do/win C. Did/win D. Does/win 4. Jim usually ________ basketball in his free time. A. to play B. play C. is playing D. plays 5. Lan will _____ swimming with me and my sister. A. go B. went C. goes D. going 6. I like ______ table tennis and do aerobics. A. to play B. play C. playing D. plays 7. _____ into the puddles. A. Not run B. Don’t run C. To run D. No run 8. Trung and Long ______ cycling last weekend. A. go B. went C. goes D. going 9. We _____ volleyball for the next match every day. A. practise B. practised C. to practise D. practising 10. Football is regarded ____ the most popular sport in the world. A. for B. as C. like D. of 11. We ____ a great time last week. A. have B . had C. has D. having 12. What ____ Tom ____ for breakfast yesterday morning?. A.does/have B.was/have C. did/have D. did/had III. Write sentences using the cues given. 1. Who/you/play/chess/last/week? → ……………………………………………………………………….. 2. Don’t/play/football/bedroom/or/kitchen. → ……………………………………………………………………….. 3. Nam/best/football/player/his/team. → ……………………………………………………………………….. 4. She/meet/her/teammates/stadium/last/Sunday. → ……………………………………………………………………….. 5. I/often/go/jogging/play/rope/skipping/park. → ……………………………………………………………………….. IV. Read the passage and write True (T) or False (F). LIONEL ANDRES MESSI Lionel Andres Messi was born on 24 June,1987. He’s an Argentine footballer. He currently plays for Barcelona and the Argentine national team. People think he’s the world’s best football player now. He was FIFA World Player of the year at the age of 21. He moved with his family to Europe in 2000 to play football for Barcelona. He was the youngest footballer to play in the 2004-2005 La Liga league season, and also the youngest to score a league goal. His successful season was in 2006-2007. Perhaps his most successful season was the 2008-2009 season. 1. Messi was born in 1987. ______ 2. He’s from Australia. ______ 3. He plays for the Argentine volleyball team now. ______ 4. He’s the best footballer in the world now. ______ 5. He was FIFA World Player of the year when he was 12. ______ 6. He started to play for Barcelona after he came to Europe in 2000. ______ 7. He was 20 in the 2004-2005 La Liga league season. ______ 8. His best seasaon with Barcelona was 2006-2007. ______ V. Put in the bracket with ONE word to complete the sentences. 1. My Tam’s ________ show at Lan Anh Stadium will be on TV next Ssunday. 2. The Voice Kids is a ________________ programme. Everyone watches it on Saturday nights. 3. The ______________ programme is on VTV3 at 7p.m every day. 4. I want to be a __________________ in the future to tell people what's the weather’s like. 5. Could you please turn down the ___________ ? It’s too loud. VI . Put the words in each sentence in the correct order. 1. favourite / show / What / your / TV / is / ? → …………………………………………………………………………………………. 2. We / programme / TV / same / the / like . → …………………………………………………………………………………………. 3. I / like / because / boring / not / show / is / do / this / it /. → …………………………………………………………………………………………. 4. watch / TV / How / you / favourite / do / your / show / often ? → …………………………………………………………………………………………. 5. show / is / on / your / favourite / What / TV / channel / ? → …………………………………………………………………………………………. 6. TV / ? / your / favourite / programme / What’s / father’s ? → …………………………………………………………………………………………. VII . Read the text and answer the questions. Sun,Sea, and Sport ! Australians love sport. They play it, they talk about it and they watch it on TV. Australian weather is perfect for sport, and there are thousands of great beaches, so swimming is very popular. The population of Australia is only about 20 million, but many of the best sportsmen and sportwomen in the world come from Australia. Young people in Australia are very active. More than 60% of children go to sports clubs. They also do activities with friends such as skateboarding, cycling, and rollerblading. The most popular sports for boys are football, swimming, Australian Rules football, tennis, cricket, basketball, rugby, martial arts, athletics and hockey. The most popular sports for girls are netball, swimming, tennis, basketball, gymnastics, football, athletics, martial arts, hockey, and horse riding. Questions: 1. What do Australilans think of sport? → ………………………………………………………………………………… 2. Why is swimming popular ? → ………………………………………………………………………………… 3. Which three sports are only popular with boys ? → ………………………………………………………………………………… 4. Which three sports are only popular with girls ? → …………………………………………………………………………………

vì sao khi bấm lỗ tai ở phần dái (tai) sẽ ít bị đau và chảy máu giúp mình với, cảm ơn mọi người nhiều ạ

Cho 9,2g natri tác dụng vs 8,0g lưu huỳnh .Sau phản ứng người ta thu được chất nào? Khối lượng bao nhiêu g