viết pt dạng phân tử và ion rút gọn khi cho a. ba(hco3)2 tác dụng với các dung dịch hno3,ca(oh)2,na2so4,nahso4 b. Na2co3 lần lượt tác dụng với các dụng dịch bacl2,. Fecl3, alcl3, hno3 c. Dung dịch Nahco3 vơi từng dung dịch h2so4 loãng, koh,. Ba(oh)2 dư.

Giúo em ghi thuật toán và vẽ sđ khối vs ạ

Cho hình thang ABCD ( AB // CD ) có góc A = 60 độ , góc C trừ góc B = 40 độ . Tính số đo các góc tứ giác ABCD ?

kể tên một số thiết bị vào/ra mà em biết ngắn gọn

Cho `x`,`y`,`z` đôi một giống nhau và $\frac{1}{x}$`+`$\frac{1}{y}$`+`$\frac{1}{z}$`=``0` Tính giá trị biểu thức`:` `A``=`$\frac{yz}{x^2+2yz}$`+`$\frac{xz}{y^2+2xz}$`+`$\frac{xy}{z^2+2xy}$

cho tam giác ABC vuông tại A, có AB=30cm, góc C=30*. Giải tam giác vuông đó

1. Being robbed in my city has become very common. (GOT) People......................robber in my city. 2. There is much more crime in our country than in the past. (USE) There......................so much crime in our country. 3. Seeing my dad with a beard still looks strange to me. (USED) I am still.............seeing my dad with a beard. 4. Driving on the right is a new experience for me. (USED) I...................on the right 5. I haven't always smoked so much. (USE) I...............so much. 6. I find it difficult to adjust to living here. (GET) I.............living here. 7. Learning Chinese isn't so difficult for me now. (GETTING) I.............Chinese 8. I went to school in this builiding (USED) This is the building............to school.

Câu1:quá trình tự nhân đôi của ADN diễn ra ở đâu.Thời gian nào

WORD FORM: L.Give the correct form of the words in CAPITAL to complete the sentences. 1. You may know that Asian, Middle Eastern and Mediterranean cultures have tcoditionally used garlic in their dishes. (TRADITION) 2. He looks on stage ( PASSION) 3. This is one of the most Contextants entertainment formats in the UK. It attracts a significantly huge number of audience ( SUCCESS) 4. His important 5. The male singer will sing their challenge phrase with a (DIFFER) 6. Housework has 7. The controller of the body is the and feel emotions. (NERVE) 8. The Brooklyns made a final decision yesterday evening. They (LEAVE) 9. I try not to remember this (FRIGHT) 10. Sorry, I can't meet you this afternoon. I 11:1 forgot my course book home this morning. Can I borrow yours? I it. (GIVE) is to invent the instrumental ballade (ACHIEVE) melody, like musical ping pong been regarded as women's work. (TRADITION) system. Led by the brain and nerves, it allows us to move, talk Edinburg for Nice. experience that only leaves me with unhappy thoughts. a friend of mine in hospital. (VISIT) it back to you after using 12. It (think) that Jack stole the painting last night. (THINK) 13. I want to get married, but I 14. Little John the right person yet. (NOT MEET) by his parents yesterday. (PUNISH) by Mrs. Joanna since April. (TEACH) 15. We 16. Waste paper 17. Besides tooth decay, 18. The main disadvantage to eating garlic is of course bad 19. She has one of the biggest art in this factory. (RECYCLE) drinks can cause many other serious health problems (SUGAR) (BREATHE) in Britain. (COLLECT) have to get over that challange to win in this contest. (CONTEST) 20. The 21. His song, Tien Quan Ca, is the 22. After his 23. Exercising regularly is a powerful weapon to enhance pAychobgical well-being (PSYCHOLOGY) 24. Foods 25. A healthy (IMBALANCE) 26. The astronaut's clothes 27. A lot of presents 28. Van Cao is known as one of the most important Composers (COMPOSE) 29. anthem of the Socialist Republic of Vietnam (NATION) national he recieved the Ho Chi Minh prize ( DIE ) down and converted into energy in the digestive system. (BREAK) between work and play ensures that everyone has a chance to enjoy their lives. from special materials. (MAKE) to the children at Christmas. (GIVE) of modern Vietnamese music are alarmed by the rate at which tropical rainforests are being destroyed. (CONSERVE) 30. He doesn't want to stay behind his father's 31. He treated them with 32. There are many people living in 33. My new car is more 34. A majority of his songs which praise 35. I love 36. Films festivals are animation. (TYPICAL) 37. A lot of toys encourage children's 38. He shot the bird but (FAMOUS) (GENEROUS) now in the world. (POOR) than the one I had before. (ECONOMY) were written during wartime. ((PATRIOTIC) songs because they give enthusiasm and ideas to what I do. (INSPIRE) divided into categories like drama, documentary or (IMAGINE) it didn't die. (FORTUNATE)

Tìm x thuộc Z để: a) Đa thức x^2+x chia hết cho x^2+x+1 b) Đa thức x^3+2x^2+x+4 chia hết cho x+1 Ai làm nhanh giúp em vs ạ, em đg cần gấp