tổng của hai số là 12,98. Nếu số thứ nhất gấp lên 2 lần và số thứ hai gấp lên 5 lần thì tổng của hai số là 54,46. Tìm hai số đó

nung 1 mẩu thép có khối lượng 10 g trong khí O2. Khí CO2 sinh ra được dẫn vào dd Ca(OH)2. phản ứng xong thu được 0,7g kết tủa. tính hàm lượng phần trăm của Cacbon trong thép đó.

giải chi tiết câu 24 với các bn

viết đoạn văn về đất nước mà em yêu thích bằng tiếng anh

1. He usually ......very hard, but he....at, all today because it's holiday (work, not work) 2. Look! That man .........out of the bank! and he....a large bag full of money!(run, carry) 3. I don't mind babysitting for you. Your baby never...(cry) 4. Every time he....a photo, his hand...., and his photos never........good(take, shake, look) 5. " Can you come out for a drink with us later ?" "Sorry I.....Lisa with her work, and it'll take us hours to finish it." (help) 6. She usually ....a BMW but today she......her husband's Volvo (drive, drive) 7. "Where do you live?" "Normally I......in Paris with my parents, but all the moment, I.....in London, so I.....with an English family"( live, study, live) 8. I....you...because you.....out of the window(know, not listen, look) 9. Julia.....five languages fluently, and at the moment she ....as a translator( speak, work) 10. I.....three pullovers in winter because I always....cold(wear, feel)

Vẽ scar Đẳng Cấp Titan nha 60 điểm đó

Exercise 8. Combine the sentences using an appropriate coordinating conjunction in the box. 1. Eat more fruit and vegetables. I want to be fitter and healthier. A. I want to be fitter and healthier , so I eat more fruit and vegetables. B. I want to be fitter and healthier , but I eat more fruit and vegetables. C. I want to be fitter and healthier , or I eat more fruit and vegetables. D. I want to be fitter and healthier , and I eat more fruit and vegetables. 2. You have a sunburn. You don’t wear a sun hat A. You have a sunburn, so You don’t wear a sun hat. B. You have a sunburn, but You don’t wear a sun hat. C. You have a sunburn, or You don’t wear a sun hat. D. You have a sunburn, and You don’t wear a sun hat. 3. You may have an allergy. Be careful with what you eat and drink. A. Be careful with what you eat and drink, so you may have an allergy. B. Be careful with what you eat and drink, but you may have an allergy. C. Be careful with what you eat and drink, and you may have an allergy. D. Be careful with what you eat and drink, or you may have an allergy. 4. Tom has a temperature. Tom has a sore throat. A. Tom has a temperature, and he has a sore throat. B. Tom has a temperature, so he has a sore throat. C. Tom has a temperature, but he has a sore throat. D. Tom has a temperature, or he has a sore throat. 5. You are catching flu. You don't wash your hands very often. A. You are catching flu, or you don't wash your hands very often. B. You are catching flu, and you don't wash your hands very often. C. You are catching flu, so you don't wash your hands very often. D. You are catching flu, but you don't wash your hands very often.

thanks to her mother's encourgement, she entered the beauty contest ->Had it............................................................................................................... She was just as good as they had thought ->She quite definitely came..................................... đặt giới từ vào chỗ trống He made a mistake .......................thinking that Alice was someone he could easlily fool

Biến đổi biểu thức sau: A =21/99-x -|x-4/9| Trả lời nhanh và chính xác thì mk tick cho nhé!

Bài 1: A): so sánh theo thứ tự tăng dần:26/15;215/253 ;10/10;26/11;152/253 B): so sánh theo thứ tự tăng dần: 5/6;1/2;3/4;3/3;4/5 C): so sánh theo thứ tự từ bé đến lớn: 21/25;60/81;19/29 D): so sánh theo thứ tự từ bé đến lớn:15/6;6/14;1;3/5;11/15;2004/1999 Bài 2: tìm phân số nhỏ nhất trong các phân số sau: A):1985/1980 ;19/60 ;1983/1981;31/30;1984/1982 B):196/198;14/45;39/37;21/60;75/175