Có 2 lít nước sôi đựng trong một cái ca. Hỏi khi nhiệt độ của nước hạ xuống còn 400C thì nước đã tỏa ra môi trường xung quanh một nhiệt lượng là bao nhiêu? Cho nhiệt dung của nước là C = 4200 J/Kg.k.

II.Choose the best word or phrase (A or B, C, D) to complete the following sentences. (4 points) 11. Why don’t we go to the zoo? ~ __________. A. Because I’m going B. Let’s drive there C. It takes an hour D. That’s a good idea 12. __________care when you bring that dish. It’s hot. A. Be B. Have C. Make D. Take 13. Kyoko wants to make __________with the other students in the class. A. friend B. friends C. friendly D. friendship 14. Listen! The news on the radio __________very interesting. A. are B. is C. has D. have 15. There are __________eggs in the supermarket. A. hundreds of B. hundreds C. hundred of D. of hundreds 16. Many Asian animals are _________danger. A. on B. at C. in D. of 17. People often go to the _________to sunbathe. A. rivers B. beaches C. mountains D. deserts 18. Mai always goes to school by bike, but today she is going to school _________foot. A. by B. in C. at D. on 19. The modern table is very beautiful, but it doesn’t fit in with the rest of the furniture, which is ……… A. recent B. antique C. expensive D. new 20. You have to throw the ball into the net when you play ……….. A. basketball B. football C. tennis D.badminton helpppp cảm ơn trước

1. I think you were wrong to sell your bike. (SHOULDN’T) -> You 2. It was unadvisable to connect these two wires. (CONNECTED) -> You 3. We took more luggage than was necessary on our holiday. (TAKEN) -> We 4. It was not necessary for him to write to his mum because she rang him. (NEED) -> He 5. His sister sent him some money, so he continued to study. (NOT) -> If 6. It was a mistake to park outside the police station. (HAVE) -> You 7. She came early last night, which wasn’t necessary because the party didn’t start still ten. (COME) -> She 8. There’s no need for you to water the plants this morning. (NEEDN’T) -> You 9. It was a waste of time worrying, after all! (HAVE) -> You 10. He had wasted too much time playing games. He failed in the last examination. (WOULD) -> If

Giúp mik vs ạ.....................

II.Choose the best word or phrase (A or B, C, D) to complete the following sentences. (4 points) A. a big breakfast B. the big breakfast C. big breakfast D. a breakfast big 5. “How .................. oranges would you like” - “A dozen. And ................. tea, please.” A. much, some B. many, any C. much, any D. many, some 6. I need a large ………….. of toothpaste. A. bar B. can C. tube D. box 7. Fish were among the earliest forms of life. Fish ……… on earth for ages and ages. A. will existed B. are existing C. existed D. have existed 8. …………….. do the buses run ? – Every twenty minutes. A. What time B. How far C. How much D. How often 9. ……………..straight across the road. A. No run B. Not run C. Don’t run D. Can’t run 10. Linda ……… her hair every day. A. washes B. wash C. clean D. cleans

Put a question tag at the end of each statement 7) Prices keep going up,........................................? 8) I've seen you before,.........................................? 9) His mother's very proud of him,......................? 10) Tom might be at home now,..........................? 11) I'd like to drink,................................................? 12) You'd been there before,...............................?

Vẽ anime / chibi buồn Hôm nay là 1 ngày rất buồn đối với tôi

a) ( x - 3 )( x2 + 3x + 9 ) + x( x + 2 )( 2 - x ) = 0. b) ( x + 1 )3 - ( x - 1 )3 - 6( x - 1 )2 = - 10.

hoá chất cần dùng để thu được Ag nguyên chất từ hỗn hợp Al2O3, Fe, Ag là a) O2 b) Dd NaOH c) H2O d) Dd HCl Có giải thik

Câu 7. Một vận động viên điền kinh chạy trên quãng đường dài 510m hết 1phút. Vận tốc trung bình của vận động viên đó là: A. 45km/h. B. 8.5m/s. C. 0,0125km/s. D. 0,0125km/h.