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thuykieuhc2k2
2 năm trước
Các bạn giúp mình nhé, mình cần gấp, hứa sẽ vote đầy đủ. Có hai ống nghiệm, một ống đựng dung dịch NaCl và một ống đựng dung dịch Na2SO3. Chỉ dùng một hóa chất, những chất nào trong số các chất sau có thể được dùng làm thuôc thử: dung dịch HCl, dung dịch H2SO4, dung dịch BaCl2, dung dịch Ba(HCO3)2 Viết các phương trình hóa học liên quan.
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Bai 9: Hoàn thành câu thứ hai dựa vào từ cho sẵn trng ngoặc. 0. my father washes the car once a month. ( is) The car is washed by my father once a month. 1. The painter displays all the paintings in the gallery. ( are) All the paintings __________________________________________________ 2. Jim turns off the kettle . ( by) The kettle________________________________________________________ 3. Peter always looks the door before 9 p.m ( locked) The door _________________________________________________________ 4. Does Jim take you to the airport? ( taken) Are you _________________________________________________________ 5. How ofte does Jane clean the room? ( is) How often _________________________________________________________ 6. My brother rarely write a long essay. ( is) A long essay _________________________________________________________ 7. My aunt arranges flowers beautifully. ( are) Flowers _________________________________________________________ 8. Mr. Smith sometimes drive the new car to work. (is) The new car _________________________________________________________ 9. I never speak English outside the classroom. ( by) English _________________________________________________________ 10/ People never open this gate. ( is) The gate_________________________________________________________ 11. people make bottles from plastic. ( are) Bottles _________________________________________________________ 12. Jane hangs the wedding photo on the wall. (by ) The wedding photo _________________________________________________________ 13. Someone guard this place twenty-four hour a day. ( is) This place _________________________________________________________ 14. Jim writes and posts his blog on social network site. ( is) Jim’s blog _________________________________________________________ 15. People harvest winter wheat in late July ( is) Winter_________________________________________________________

Bai 9: Hoàn thành câu thứ hai dựa vào từ cho sẵn trng ngoặc. 0. my father washes the car once a month. ( is) The car is washed by my father once a month. 1. The painter displays all the paintings in the gallery. ( are) All the paintings __________________________________________________ 2. Jim turns off the kettle . ( by) The kettle________________________________________________________ 3. Peter always looks the door before 9 p.m ( locked) The door _________________________________________________________ 4. Does Jim take you to the airport? ( taken) Are you _________________________________________________________ 5. How ofte does Jane clean the room? ( is) How often _________________________________________________________ 6. My brother rarely write a long essay. ( is) A long essay _________________________________________________________ 7. My aunt arranges flowers beautifully. ( are) Flowers _________________________________________________________ 8. Mr. Smith sometimes drive the new car to work. (is) The new car _________________________________________________________ 9. I never speak English outside the classroom. ( by) English _________________________________________________________ 10/ People never open this gate. ( is) The gate_________________________________________________________ 11. people make bottles from plastic. ( are) Bottles _________________________________________________________ 12. Jane hangs the wedding photo on the wall. (by ) The wedding photo _________________________________________________________ 13. Someone guard this place twenty-four hour a day. ( is) This place _________________________________________________________ 14. Jim writes and posts his blog on social network site. ( is) Jim’s blog _________________________________________________________ 15. People harvest winter wheat in late July ( is) Winter_________________________________________________________

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