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thuongthiet
2 năm trước
Trong các phản ứng sau, phản ứng nào thể hiện tính oxi hóa của lưu huỳnh đơn chất? (giải thích bằng cách xác định số oxi hóa) A. S + O2 →SO2 B. S + Na2SO3 →Na2S2O3 C. S + HNO3 →SO2 + NO2 + H2O D. S + Zn →ZnS * Viết pt kèm số oxi hoá cả abcd dùm e vs ạ E sẽ vote 5*+ ctlhn
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Ai làm giúp mik vs mik cần gấp ạ 1. A. wanted B. naked C. danced D. needed 2. A. who B. when C. where D. what 3. A. skill B. split C. children D. finance II. Find the word which has different stress pattern from the others. (0.5 point) 4. A. artistic B. historic C. dramatic D. scientific 5. A. media B. hospital C. politic D. electric 6. A. resort B. expedition C. environment D. affordable III. Choose the best answer to complete each sentence. 7. If I ________you, I would see the doctor right away. A. be B. am C. were D. have been 8. If the factory _____ dumping poison into the lake, all the fish and other aquatic animals will die. A. continues B. to continue C. continued D. will continue 9. Scotland is an interesting place to visit with its rich _____ A. culture B. cultural C. natural D. naturally 10. If the air wasn’t dirty, I ______________ so much. A. wouldn’t sneeze B. sneeze C. would sneeze D. to sneeze 11. If the factory continues dumping poison into the lake, all the fish and other aquatic animals ______________. A. die B. to died C. dead D. will die 12. Water pollution is the ______________ in the lake has made the fish die. A. contaminating B. contaminate C. contaminated D. contamination 13. The Statue of Liberty in New York is a monument which ________ freedom. A. symbolize B. symbolizes C. symbol D. symbols 14. Before the storm hit the village, people _____________. A. evacuate B. evacuates C. had evacuated D.are evacuating 15. Factories _______waste into rivers if the government fines them heavily A. do not dump B. did not dump C. is not dumped D. won’t dump 16. The kangaroo ___________ a symbol of Australia since 1973. A. becomes B. has become C. has been become D. became 17.The earthquake occurred____________ midday when they were having lunch. A. at B. in C. on D. of 18 .We ______any natural disasters before we were trapped in an avalanche last month. A. haven’t experienced B. didn’t experience C. won’t experience D. hadn't experienced 19. What_________ by the time the mudslide occurred? A. had the government done B. has the government done C. did the government do D. is the government done 20. After our plane ……. , we waited for an hour for our luggage. A. had been landed B. has landed C. had landed D. was landing

Exercise 3: 1. I /be used / get up early / so / not mind / leave / 5 o’clock / morning. ………………………………………………………………………………………………………… 2. She / be / good / singer / that / she / ask / join / band. ………………………………………………………………………………………………………… 3. Jane / promise / keep / touch / us / while / she / be / Australia. ………………………………………………………………………………………………………… 4. Despite / leave / home / early / we / miss / beginning / film. ………………………………………………………………………………………………………… 5. They / have / dog / look / neighbour / whenever / they / go / holiday. …………………………………………………………………………………………………………

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