Câu C sai sản phẩm CH2 vì C thiếu hoá trị
Làm giúp mình mấy bài này vs mình sẽ đền đáp đầy đủ
Giúp em với ạ càng nhanh càng tốt ạ
mọi người giúp e vói e cảm ơn ạ
Cho 3,36 lít khí hidrocacbon X (đktc) phản ứng hoàn toàn với lượng dư dd AgNO3 trong NH3 thu được 36 gam kết tủa. CTPT của X?
lamf giups mik nha!! mik sex vote 5 * và cám ơn, ctrlhn Bài 1. Chứng minh rằng: S=3+3^2+3^3+3^4+3^5+3^6+3^7+3^8+3^9 chia hết cho (-39) Bài 2. Cho số (gồm 20 chữ số 1). Hỏi số a có chia hết cho 111 không? Bài 3. Cho a, b là các số nguyên. Chứng minh rằng 5a + 2b chia hết cho 17 khi và chỉ khi 9a + 7b chia hết cho 17.
Bore excite interest tire interest bore 1. I wish this book weren’t so ........... I keep falling asleep whenever I try to read it. 2. Do you think football is - ............................? Oh, I don’t think so. I find table tennis is a most suitable sport for mysefl.” 3. I’m ..................... right now. Last night I had a terrible nightmare? 4.The film was ................................... Nothing happened. 5. Thomas was very ................... about his new bicycle as a birthday present. He had woken up at 5 a.m and role the bicycle around the street. 6. This is a very ............... book about the history of the cinema. I’m learning a lot.
Giúp mình giải bài này vs mình bị mất căn bản
giai bai nay giup minh minh cam on
I. Read the passage below and decide whether the statements are TRUE or FALSE? Television has become an important part of people's life. It’s a wonderful source of information and entertainment. It’s also a great tool for learning and communication. People have enjoyed spending their time watching TV every day. There are both national and local channels on TV. Adults enjoy watching news, talk shows, and series. Children likes watching cartoons, comedies and some educational programs. It’s relaxing to watch television after a long day of hard work. 1. Television is a source of information and entertainment. 2. We cannot use TV for learning. 3. People watch TV every day. 4. Adults enjoy watching cartoons, comedies and some educational programs. 5. It’s relaxing to watch television after a long day of hard work. II. Choose the letter A, B, C or D to complete the passage below Television is one of _________ (6) inventions of human beings. Today we can find television almost everywhere ___________ (7) the world. The first television was invented in 1927 by a 21 years old inventor – Philo Taylor Farnsworth. Watching television __________ (8) both recreational and informative. There are some news programs for adults _________ (9) information. There are also tutorial channels based on specific subjects for the students. ___________ (10), it’s harmful to spend too much time watching television. Some shows are too violent for the children to watch because they may imitate. 6. A. greater B. the greatest C. great D. greater than 7. A. of B. on C. in D. at 8. A. is B. are C. be D. am 9. A. to get B. getting C. get D. to be getting 10. A. Because B. Therefore C. But D. However III. Choose the letter A, B, C or D to answer these following questions Hi, my name is David and my favorite activity is watching television. I often watch cartoon on Disney channel. My grandmother and mother enjoy watching craft programs. My daddy and brother love watching football matches on the sport channel. I usually spend about 2 hours a day watching TV. In the evening, all the family gather and watch the news and weather forecast. Today, the weatherman announces that it will rain tomorrow. I think you should bring along a raincoat before going out. 11: What is David’s hobby? A. dancing tango B. playing football C. watching television D. doing homework 12: What does he often watch on Disney channel? A. news B. cartoon C. craft D. sports 13: Who love watching football matches? A. His brother B. His father C. His mother D. Both A&B 14: How many hours a day does David spend watching TV? A. one B. two C. three D. four 15: Will it rain tomorrow? A. Yes, it will B. Yes, it is C. No, it won’t D. No, it isn’t
who is.................. student in your class (tall)
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