Đáp án:
Giải thích các bước giải:
gọi công thức tổng quát là XO
- tác dụng với nước :=>XO+H2O->X(OH)2 ( đấy là oxit bazo tan nha )
- tác dụng axit=>XO+HY->H2O+XY2 (HY là axit bất kì )
-tác dụng với oxit =>XO+YO2->XYO3 ( YO2 là oxit axit nhé )
1. She doesn’t live in London because she doesn’t know anyone there She’d will lived in london if she known anyone in there 2. I can’t live in the country because I can’t find a job there I’d will 3. I don’t have a spare ticket. I can’t take you to the concert If I ………………………………………………………………... 5. They don’t understand the problem. They won’t find a solution If they didn’t undertand the problem they wont find the solution 6. He sits around too much. He isn’t fit. If he not sat ảound too much he wont fit 7. She’s very thin; perhaps that’s why she feels cold so much. If she wasn’t thin she will feels cold so much 8. He never polishes his shoes, so he never looks smart If he polished his shoes he will looks smart 9. He can’t park near his office; that’s why he doesn’t come by car If he wasn’t come by car he couldn’t park near his office 10. My house is guarded by two big dogs. That’s the only reason it isn’t broken into every night If my house 11. The flats are not clearly numbered, so it is very difficult to find anyone. If the flats …..……………………………………………………….. 12. I don’t know her e-mail address, so I can’t tell you If I ……………………………………………………………………. 13. She works in the evening. She has no time to play with her children If she …………………………………………………………………. 14. I am not tall enough to join the basketball team If I …………………………………………………………………… 15. He doesn’t see the signal so he doesn’t stop his car If he …………………………………………………………………. 16. Peter gets bad marks because he doesn’t prepare his lessons well If Peter ……………………………………………………………… 17. Mary doesn’t have enough money. She can’t buy a new car. If Mary ……………………………………………………………… 18. Go right now or you’ll be late for the train. If you…………………………………………………………………. 19. Hurry up, or we will be late for the exam. If we …………………………………………………………………
Trong đường biểu diễn sự thay đổi nhiệt độ theo thời gian khi đông đặc, đường biểu diễn sau khi chất đó đã đông đặc hết là: đường cong đoạn thẳng nằm ngang đoạn thẳng nằm nghiêng đường thẳng đứng
Cho a,b thuộc N và a+b=5 Tìm GTNN của tích a×b
Mng giúp em với ạ, em đang cần gấp, hứa vote 5 sao nhaaa :((
Calli: Chúa Lười ________________________________ Thầy giao bài ko lèm
Tại sao hiệu điện thế giữa 2 điểm MB lúc này lại bằng U2 vậy???
Nhiệt kế nào dưới đây dùng để đo nhiệt độ cơ thể người? Nhiệt kế rượu Nhiệt kế thủy ngân Nhiệt kế y tế Nhiệt kế rượu, nhiệt kế thủy ngân và nhiệt kế y tế Giai thich them nhe
Mn ơi giúp em với càng nhanh càng tốt ạ
VI. Complete the passage Ann lives in London. She is twenty-nine and works for the BBC. Every weekday she gets up at 3.00 in the morning because the program starts at 6.30. She loves her work (..1..) it is exciting and she meets a lot of very interesting people, but she loves her weekends, (..2..). On Fridays she comes home from the BBC at about 2.00 in the afternoon and she just (..3..). On Friday evenings she (..4..) out, but sometimes a friend comes for dinner. He or she brings wine and they cook. Ann loves cooking. They (..5..) music or just chat. On Saturday mornings she gets up at 9.00 and she goes (..6..). Then in the evenings she sometimes goes to the theater or the opera (..7..) a friend - she loves opera. Then they eat in her favorite restaurant. On Sunday morning she stays in bed late. She doesn’t get up (..8..) 11.00. Sometimes she visits her sister. She lives in the country and has two children. She likes (..9..) with her nieces, but she (..10..) early because she goes to bed at 8.00 on Sunday evenings. 1. A. although B. but C. because D. if 2. A. so B. too C. either D. neither 3. A. relaxes B. relaxing C. for relaxing D. to relax 4. A. doesn’t go B. mustn’t go C. needn’t go D. can’t go 5. A. chat B. listen to C. hear D. rest 6. A. shop B. to shop C. for shopping D. shopping 7. A. on B. at C. for D. with 8. A. to B. from C. on D. until 9. A. plays B. playing C. with playing D. to playing 10. A. comes B. goes C. leaves D. arrives
1. We plant more trees. The air will be fresher. If .................................................................................................................................. 2. We will use fewer cars. We will reduce pollution. If .................................................................................................................................. 3. We cycle to school every day. We will keep fitter. If .................................................................................................................................. 4. We will use recycled products. We will save money. If .................................................................................................................................. 5. People throw rubbish into the right bin. They will keep the environment clean. If ......................................................................................................................
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