1.Tìm chữ số a,b,c,d bt: a,1ab+36=ab1 b,abc +acc +dbc=bcc NL:nhanh ạ!!!1(giải =cách lớp 6 hay giải nha,ko đúng =bc nha)

Tính số MOL các chất có trong a) 85,5 (g) nhôm sunfat b) 4,8 nhân 10 mũ 26 phân tử ni tơ c)1,5 nhân 10 mũ 22 phân tử sắt từ ô-xit d) 3,56 lít khí hidro (đktc) e)168 ml khí ni tơ (đktc) f) 720 ml nước g) 0,115 m3 rượu ( C2H5OH) biết khối lượng riêng của rượu là 0,8 g/ml

I. Choose the best answer: 1. I arrive at work _____ nine o’clock. A. at B. in C. to D. for 2. I get up ____ seven o’clock every morning. A. till B. in C. for D. at 3. They will come here ______11:30 AM. A. between B. at C. for D. in 4. There is a meeting_____9:00 AM and 2:00 PM. A. till B. at C. on D. between 5. We have lived in Hanoi_____ 4 years. A. since B. for C. at D. in 6. April comes _____ March. A. after B. before C. during D. with 7. I had only a sandwich_______ lunch. A. for B. to C. at D. by 8. She has come here _____ yesterday. A. since B. for C. on D. X 9. He was born_____15th, January.A. on B. at C. in D. of 10. We will be there _____ 5:00 o’clock early_____ the morning. A. on / in B. at / in C. in /on D. in / at

Xác định bptt và tác dụng giúp e

vẽ chữ calli chữ Nguyễn Tuấn Phong

I.Fill in : In – On – At – X (2) 11. The movie starts _________ 20 minutes. 12. They were very popular __________ the 1980s. 13. Are you staying at home ________ Christmas Day. 14. I have English classes ______ Tuesdays. 15. The children like to go to the park ________ the morning. 16. Justin Bieber was born __________ March 1, 1994. 17. The pilgrims arrived in America _______ 1620. 18. I like to watch the parade ___________ Independence Day. 19. I shall see her _____ the beginning of the week. 20. Hippies protested against the war _________ the 1960s. 21. Goodbye! See you _____ Monday. 22. We finished the marathon ________ the same time. 23. We are going to the theatre_____ this evening 24. Let’s meet _____ Tuesday. 25. I’ll be there _______ 10 minutes.

I.Fill in : In – On – At – X (1) 1. Let’s meet ______ two hours. 2. I can’t work _______ night. 3. Let’s do it _______ the weekend. 4. I saw her ________ my birthday. 5. Do you want to go there ________ the morning? 6. I like going to the beach _______ the summer. 7. Did you see her _________ today. 8. The bus collected us ________ 5 o’clock early ________ the morning. 9. The factory closed _________ June. 10. They saw that car_________ half past ten.

Tí rót một cốc sữa đầy, uống 1 6 cốc rồi đổ nước lọc vào đầy, xong uống 1 3 cốc rồi đổ nước lọc vào đầy. Tiếp đó Tí uống 1 2 cốc rồi lại đổ nước lọc cho đầy và uống hết. Hỏi Tí uống sữa hay nước lọc nhiều hơn?

Một người thợ cưa cay gỗ 4m thanh nhiều đoạn mỗi đoạn dai 0,5 m mỗi lần cưa hết 5 phút hỏi thời gian để cưa xong cái đo là bao nhiêu

Giúp mình nhanh với ạ cảm ơn nhiều 😊