Hòa tan 18,4 gam hỗn hợp Fe và Mg bằng dung dịch axit H2SO4 loãng thu
được 11,2 lít khí hidro (điều kiện tiêu chuẩn). Tính khối lượng mỗi kim
loại trong hỗn hợp ban đầu
Cho biết trong đoạn văn này câu nào là đối thoại, độc thoại và độc thoại nội tâm?
6 tháng 12 2021 lúc 13:42
Rút gọn biểu thức sau :
B= tan2x . cos2x + cos2x -10
I. Rewrite each of the following sentences in another way so that it means almost the same as the sentence printed before it:1. Be quiet or you will not understand the lesson.→ If ___________________________________________________________________2. Study harder and you will not fail the coming exam.→ If ___________________________________________________________________3. Work harder or you won’t get high salary.→ If _____________________________________________...
Đọc tiếp
I. Rewrite each of the following sentences in another way so that it means almost the same as the sentence printed before it:
1. Be quiet or you will not understand the lesson.
→ If ___________________________________________________________________
2. Study harder and you will not fail the coming exam.
→ If ___________________________________________________________________
3. Work harder or you won’t get high salary.
→ If ___________________________________________________________________
4. Practice speaking English every day or you can’t improve your English.
→ If ___________________________________________________________________
5. The children like to walk in the rain.
→ The children enjoy _____________________________________________________
→ The children are _______________________________________________________
6. I think surfing the Net is useful.
→ I find it_______________________________________________________________
7. I don’t think she broke the vase accidentally.
→ I think _______________________________________________________________
8. Watching TV consumes a lot of time.
→ Watching TV is a ______________________________________________________
9. Can’t you control the child?
→ You ________________________________________________________________ ?
10. “I don’t know anything about it,” he said.
→ He denied ____________________________________________________________
11. Did they understand the problem?
→ They hardly__________________________________________________________ ?
12. He forced me to put my hands up and quickly searched through my pockets.
→ I ____________________________________________________________________
13. “Don’t forget to phone the office,” she told him.
→ She reminded _________________________________________________________
14. Mary will watch the film in three hours.
→ It will ________________________________________________________________
15. The children are excited about going to the circus.
→ The children are looking_________________________________________________
16. He is interested in reading detective books.
→ He enjoys _____________________________________________________________
17. Do you find it difficult to speak English?
→ Do you have any _______________________________________________________
18. My father needs 15 minutes to read “Tuoi Tre” newspaper every morning.
→ My father spends_______________________________________________________
19. The floor was cleaned by Loan
→ Loan_________________________________________________________________
20. The Browns last painted the living-room two years ago.
→ The Browns have ______________________________________________________
21. Would you close the door, please?
→ Would you mind ______________________________________________________ ?
22. They didn’t allow us to smoke here.
→ They didn’t let _________________________________________________________
23. My teacher advised buying that book.
→ My teacher advised us ___________________________________________________
24. He has studied English for six years.
→ He began _____________________________________________________________
25. It is necessary to master English.
→ Mastering ____________________________________________________________
26. He spent two hours writing the essay.
→ It took _______________________________________________________________
27. He expects to hear from her as soon as possible.
→ He is looking __________________________________________________________
28. I would like you to help me (to) put the chairs away?
→ Do you mind _________________________________________________________ ?
29. Don’t forget that you have to do this homework.
→ Please remember _______________________________________________________
30. Don’t ask so many questions.
→ Please stop ____________________________________________________________
31. He hasn’t smoked for 3 years.
→ He stopped ____________________________________________________________
32. It's not a good idea to travel during the rush hour.
→ It's better to____________________________________________________________
Cho 9 điểm trên một đường tròn. Hỏi có thể vẽ được bao nhiêu hình có 8 cạnh khi lấy các điểm đó làm đỉnh.
\(\sqrt{5x^4}+10x+30+\sqrt{3x^2}+6x+12-8=0\)
Tìm số thập phân A, biết nếu dịch chuyển dấu phẩy của số A sang bên trái một hàng được số B và sang bên phải một hàng được số C và C - B = 196,614.
Bài toán cho k/g hỗn hợp 2 kim loại với dung dịch axit
a, Tính nồng độ mol của dung dịch axit cần dùng
b, Tính thành phần % theo k /g mỗi kim loại trong hỗn hợp ban đầu