Cho hình trụ có bán kính đáy R = 4 cm và chiều cao h = 12 cm. Tính diện tích xung quanh của hình trụ này.

Các câu hỏi liên quan

III. REWRITE : 1. If he doesn’t take more care, he’ll have an accident. ->Unless . ……………………………………………………………….. . 2. The crops will be ruined if it doesn’t rain soon. ->Unless ......... . …………………………………………………………………….. 3. Unless the weather is fine, we’ll stay at home. -> If . . . . …………………………………………………………………….. 4. I can’t go with you unless I get my work finished. ->If ............... . …………………………………………………………………….. 5. If you don’t leave on the 15th , you’ll get home late for your mother’s party. -> Unless............ . ……………………………………………………………….. 6. Tom never does anything unless his father tells him what to do. ->If ............ . ………………………………………………………….. 7. Don’t take this job if you don’t really want it. ->Unless ............ . ………………………………………………………………….. 8. If she does nothing to prepare for the test, she will get bad marks. ->Unless ......... . ……………………………………………………………….. 9. You can’t visit the United States unless you get a visa. ->If ............... . …………………………………………………………………….. 10. Unless you remember our address, you can find it in the phone book. ->If ...................... . …………………………………………………………………..

Bài 1: Chuyển các câu sau sang bị động : 1. My father waters this flower every morning. => This flowwer 2. John invited Fiona to his birthday party last night. => Fiona 3. Her mother is preparing the dinner in the kitchen. => The dinner 4. We should clean our teeth twice a day. => Our teeth 5. Our teachers have explained the English grammar. 6. Some drunk drivers caused the accident in this city. 7. Tom will visit his parents next month. 8. The manager didn’t phone the secretary this morning. 9. I won’t hang these old pictures in the living room. 10. The German didn’t build this factory during the Second World War. 11. The Greens are going to paint this house and these cars for Christmas Day. 12. Ann had fed the cats before she went to the cinema. 13. The students have discussed the pollution problems since last week. 14. Some people will interview the new president on TV. 15. He has broken his nose in a football match. Bài 2: Chuyển các câu sau sang bị động: 1. The boys broke the windows yesterday. 2. Someone stole Nam’s wallet. 3. John eats this cake. 4. A tiger kills a deer. 5. He learns English at school. 6. She bought a new hat last night. 7. They wrote the book many years ago. 8. Peter reports the news every day. 9. They moved the fridge into the living room. 10. He started this work last month. 11. We should clean our teeth twice a day. 12. Some people will interview the new president on TV. 13. We can’t finish our work on time. 14. Her husband never takes her to the cinema. 15. He was doing his homework at 9 p.m yesterday.