Chất có thể tác dụng với nước tạo thành dung dịch làm quỳ tím chuyển thành màu đỏ là: A. Na2O, SO2, SiO2; B. P2O5, SO3; C. Na2O, CO2; D. KCl, K2O.

Hãy làm sạch muối ăn có dính đất cát ?

Vì khuẩn nó sẽ có thành tế bào mang tên là j Làm ơn giúp tui

Viết 1 đoạn văn tiếng anh về thành phố Seul

Thống kê những từ ghép là động từ, tính từ, danh từ trong 2 đoạn thơ “Chị em Thuý Kiều” + “Kiều ở lầu Ngưng Bích”

1.We don’t drink beer. We are not used 2.Nam was late for class. Nam used 3.Please keep quiet in the hospital. I would rather 4.We spent 45 minutes playing football. It took 5.My mum made a cake in about an hour. My mum spent 6.It’s time for us to do the homework. It’s time we 7.We will have a test tomorrow. We wish 8.Minh usually stays up late playing video games. I wish 9.It’s time for me to go. It’s time 10.My father doesn’t smoke any more. My father used 11.Mai can’t visit her pen pal in Malaysia. Mai wishes 12.She has difficulty driving on the left. She doesn’t get 13.because / was really / were friendly / Maryam / impressed / Ha Noi people / . / 14.the ringgit / the Malaysian / is / unit of currency /. /

Bài 1 Thực hiện phép tính ( tính nhanh nếu có thể ) a) ($\frac{-5}{9}$) . $\frac{3}{11}$ + (-$\frac{13}{28}$) . $\frac{3}{11}$ b) (2$\frac{2}{15}$ . $\frac{9}{17}$ . $\frac{3}{32}$ : (-$\frac{3}{7}$) c) (-$\frac{3}{4}$ + $\frac{2}{5}$) : $\frac{3}{7}$ + ($\frac{3}{5}$ + $\frac{-1}{4}$) : $\frac{3}{7}$ d) $\frac{7}{8}$ : ($\frac{2}{9}$ - $\frac{1}{18}$) : $\frac{7}{8}$ : ( $\frac{1}{36}$ -$\frac{5}{12}$)

BÀI TẬP VIẾT LẠI CÂU ĐIỀU KIỆN 1. Unless you stay at your bed, you will be punished. => If …………………………………………………………………………………………………………. 2. Unless she drinks water, she will feel thirsty. ( if … not) => If …………………………………………………………………………………………………………. 3. If they weren’t absent now, they would meet the head master. => Unless ……………………………………………………………………………………………………. 4. If he didn’t clean up the car now, his boss could ask him to do this. => Unless ……………………………………………………………………………………………………. 5. You can’t run fast unless you try your best. => .................................................................................................................. 6. Because Tom is out, you don’t see him at home. => ............................................................................................................ 7. People hear you coming to my office. They phone me. =>.............................................................................................................. 8. Minh doesn’t get rid of his job because he loves working with computers. => ................................................................................................................ 9. Because my mother is here, I don’t ask for some money. =>......................................................................................................... 10. The books are expensive. I can’t buy them. =>............................................................................................................... 11. Harry Porter is an adventure film because it talks about the life and the discoveries of him. =>.............................................................................................................. 12. Stop smoking, you won’t be healthy. => ................................................................................................................ 13. I don’t like cats because cats are fury. =>........................................................................................................... 14.Anne doesn’t attend the party because she wants to be alone. =>............................................................................................................. 15. Sports make people healthy, so they do exercise every morning. =>........................................................................................................ 16. Dannis isn’t at home because he is on business. =>........................................................................................................... 17. Study hard or you’ll fail the exam.  If . 18.I don’t see you very often because you live so far.  If . 19.I don’t have enough money, so I’m not going to buy that skirt.  If . 20. We don’t practice English very often - We can’t communicate with foreigners. => . 21. I can’t meet you now- I have to work.  If . 22. Hurry up or you will be late.  If 23. She is very busy, so she can’t help me now.  If 24. You’re unfit because you don’t take exercise.  If

tính bằng cách hợp lý : 18 576 :{ 105 mũ 0 [ 2 * ( 102 + 101 -100 -99 + 98 + 97 -96 - 95 +.............+ 6+5-4-3+2+1) -201 ]}mũ 3 . Giúp mình với nhé

giúp em vớiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii