- Oxit axit: `SO_3`; `N_2 O_5`; `CO_2`.
(Oxit axit là oxit của 1 phi kim và tương ứng với 1 axit)
- Oxit bazơ: `Fe_2 O_3; CuO; CaO`.
(Oxit bazơ là oxit của 1 kim loại và tương ứng với 1 axit)
Đáp án:
Giải thích các bước giải:
Chất thuộc oxit bazo là Fe2O3, CuO , Cao
chất thuộc oxit axit là SO3, N2O5, CO2
Đề bài: Em từng có giấc ơ thành một thiên thần, làn gió, đám mây, giọt sương... chu du khắp thiên hạ.Hãy miêu tả cảnh đẹp của những nơi mà em đặt chân đến. Mn giúp em với ạ, nếu có thể thì viết đừng dài quá hộ em với ạ (Ko chép mạng nha)
11. How about going cycling round the lake .................Saturday? A. in B. at C. for D. on 12. Oanh says that it’s healthy to................. . A. cycle B. walk C. stay home D. play games 13. Mai and I agree .................every afternoon. A. to go cycling B. go cycling C. going cycle D. to go cycle 14. The main................. in Titanic are Jack Dawson and Rose DeWitt Bukater. A. character B. characters C. plot D. plots 15. Trung usually goes to work .................bus. A. by B. on C. for D. with 16. Your behaviour is__________. You should not be rude. A. disappointing B. disappointed C. disappoint D. disappoints 17.________this movie is entertaining, not many people like it. A. Because B. Although C. Because of D. Despite 18. My father _________ to work by motorbike. Now he cycles. A. used to goes B. use to go C. used go D. used to go 19._________the difficulty, they tried to finish all their tasks. A. because of B. because C. although D. in spite of 20. “One-way street”, “No parking” are________. A. road signs B. means of transport C. traffic rules D. mistakes 21. She is_________than me. A. lazyer B. lazier C. more lazy D. more lazier 22. He sings________. Nobody wants to listen to his voice. A. bad B. badly C. well D. good 23. She usually _______ to school with her dad. A. go B. went C. goes D. is going 24. This movie is about the war between the planets in the space. It is a_________movie. A. romantic B. comedy C. documentary D. sci-fi 25._______ the way to school, I can see a ‘no left turn’ sign. A. In B. On C. To D. At 26. Please get____________the bus. We have finished our journey. A. on B. of C. off D. up 27. Carnival (Carnaval in Portuguese) is a popular _______ in many countries in South America. A. festival B. parade C. celebrate D. film 28. Titanic is a/an _______film, which was directed by James Cameron. A. sci-fi B. thriller C. horror D. romantic 29. How about ________ a film? A. see B. to see C. seeing D. to seeing 30. Always look _______ where you go. A. carelessly B. careful C. careless D. carefully 31. I _________ a tricycle when I was a child. A. used to ride B. use to ride C. used to riding D. used ride 32. The highlight of the Rio Carnival is the Samba Parade with thousands of samba _______ from various samba schools. A. perform B. performers C. performance D. performer 33. How do you think about my new book? – I find it_______. A. excited B. excite C. excitingly D. exciting 34.They canceled the match________it rained heavily. A. because of B. because C. although D. in spite of 35.The central square is_________. It is full of people and noise. A. quiet B. peaceful C. crowded D. calm 36. Critics say the film is very _______. A. frighten B. frightening C. frightened D. fright 37. Always _______ your seatbelt when you drive. A. fasten B. tide C. widen D. bring 38._______ if you feel tired or after you drink alcohol. A. Don’t drive B. Drive C. Don’t do D. Do
cần làm nhanh vote tốt : Cho các dung dịch có cùng nồng độ (1M): NaCl, K2SO4, HF, C6H16O6 (đường glucozơ). So sánh khả năng dẫn điện của các dung dịch trên, giải thích ?
Anh chị giúp em với ạ Em đang cần gấp ạ Em cảm ơn ạ
Phản ứng nhiệt độ cao kí hiêu là $t^{o}$ Vậy phản ứng cần nhiệt độ âm cần kí hiệu không.
Các anh chị làm hết giúp em nha please
giúp em với huhu 50 đ ạ vote hết đầy đủ
các bạn giúp mình nhanh nha mình đang rất gấp
Vẽ semi mệt mỏi or calli "Mệt mỏi" Nl: mình và bạn Dâu cùng trl 1 câu mng ạ ;-; không phải câu bth mà là câu dạng Tutorial (chỉ ngta làm cái rì đó). Mmình trl xoq mà muốn khók 😥 vì nó mệt gãy tay =))))) Èo mng quan tâm vào câu trl mới nhất của tui nha T^T buồn quá :( mỏi tay quá :< shock quá :<
XI. Read the passage and answer the questions. Almost a hundred thousand people were killed and half a million homes destroyed as a result of an earthquake in Tokyo in 1923. The earthquake began a minute before the noon when inhabitants of Tokyo were cooking their midday meals. Thousands of stoves were overturned soon as the earth began to shake. As a result, small fires broke out everywhere and quickly spread. The fire engines were prevented from going to help because many of the roads had cracked open. It was impossible to use fire fighting equipment as most of the water pipes burst. Consequently, over ninety percent of the damage was caused by fire rather than by the collapse of the buildings. Questions: 1. How many people were killed in the earthquake in Tokyo in 1923? 2. Did the earthquake happen at noon or at night? 3. Why were the fire engines prevented from going to help? 4. Was it possible to use fire fighting equipment as most of the water pipes had burst? Giải giúp mính với
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