All lm jup em bài 2 làm hết bài 2 nhé all ơi jup đi

Hiđro peoxit (H2O2) là hợp chất : A. chỉ thể hiện tính oxi hoá. B. vừa thể hiện tính oxi hoá, vừa thể hiện tính khử. C. rất bền. D. chỉ thể hiện tính khử.

Giúp mình với các bạn ơi 1. It was such a hard cake that I couldn’t eat it. The cake ............................................................................................................................ 2. Linh is a better cook than Hoa. Hoa can’t ............................................................................................................................ 3. I last heard this song ten years ago. It is ............................................................................................................................ 4. “You’d better not lend that man any more money, Mary” said John. John advised ............................................................................................................................ 5. It was a two – hour flight from Ha Noi to HCM city’’. It took ............................................................................................................................ 6. When he is asked about past, he hates it. He hates ............................................................................................................................ 7. We don’t have enough money, so we can’t buy that house. If we ............................................................................................................................ 8. Although he took a taxi, Bill still arrived late for the concert. Despite ............................................................................................................................ 9. Theater seats can be booked by telephone. You ............................................................................................................................ 10. Your little brother’s hair is so long that he can’t see through it. Your little brother ought to ....................................................................................................... 11. I’ve never been to a less exciting concert. It was ............................................................................................................................ 12. If he improves his spelling, he will get good grades. Unless ............................................................................................................................ 13. “ I’ll never come back here again,” said the angry tourist. The angry tourist ........................................................................................................................... 14. The red car is $25.000. The blue car is $15.000. (Comparison) The red car ............................................................................................................................ 15. Because of being lost, we stopped to ask a policeman for directions. We ............................................................................................................................ 16. We are worried because we have to live very far from our parents. We wish ............................................................................................................................ 17. He hasn’t been to the doctor’s for over a year. He hasn’t had ............................................................................................................................ 18. That old keyboard is not worth repairing.It is pointless to ............................................................................................................................ 19. I last met her in the station a year ago. I haven’t ............................................................................................................................

Chiều nay e nộp bài mong mn giải hộ ạ. Yêu cầu câu 3,4,5 nhưng ai có lòng tốt thì giải hết cũng đc ạ (e hứa vote 5 sao, hay giải thêm bài khác trừ bài 1,2 e cũng sẽ vote ạ). Thank you!!!

a: 2x mũ 2 yz + 4 xy mũ 2 z - 5 x mũ 2 y z - xyz B: x mũ 3 - 5xy + 3x mũ 3 + xy - x mũ 2 - 1 phần 2

Đốt cháy 3 gam chất hữu cơ A thu được sản phẩm gồm 6,6 gam CO2 và 3,6 gam H2O. Biết tỉ khối hơi của A so với hiđro là 30. Công thức phân tử của A là: A. C2H6O B. C2H4 C. C2H6 D. C2H4O

a) Em hay trinh bay thu tu cac buoc de sap xep diem trong cot toan theo thu tu tang dan ; diem trung binh theo thu tu giam dan b) Em hay trinh bay thu tu cac buoc de loc ra nhung ban co diem 10 mon tin hoc

Trong công nghiệp, người ta sản xuất rượu etylic bằng cách dẫn 4,48 lit khí Etylen C2H4 ( đktc) qua nước ( có pha H2SO4 đ, nhiệt độ) A. Vậy với 4,48 lit khí Etylen trên thì thu được bao nhiêu gam rượu. Biết hiệu suất phản ứng là 90% B. Người ta cho lượng rượu trên vào 30ml nước thì độ rượu là bao nhiêu? Biết khối lượng riêng của rượu là 0,8 g/ml giúp mình với các bạn

Làm hộ em câu b nhé câu a em làm rồi ạ Bài 3 : Cho tam giác ABC vuông tại A với BC = 6 cm, AC = 4 cm. Kẻ tia Cx vuông góc với BC (tia Cx và điểm A nằm khác phía so với đường thẳng BC). Trên tia Cx lấy điểm D sao cho BD = 9 cm. a) Chứng minh BD // AC b) Tính tỉ số diện tích của hai tam giác: ∆ABC và ∆BDC

Giúp mình với các bạn ơi 20. They said we couldn’t look at the house. (didn’t allow) ............................................................................................................................ 21. I went away, so he had to solve the problem. I left ............................................................................................................................ 22. It’s an eight –hour flight to the West Coast. It takes ............................................................................................................................ 23. “Why don’t you postpone your trip till the fall, Jim?” suggested Sarah. Sarah suggested ........................................................................................................................... 24. “You’d better not spend any more time in the sun, Kate” said Annie. Annie advised ............................................................................................................................ 25. Don’t tell anyone if we let you into the secret. Don’t tell anyone if you .................................................................................................................. 26. They used to sew every button on by hand. Every button ............................................................................................................................ 27. I prefer to go by myself. I would ............................................................................................................................ 28. The police think the man holding the hostages is heavily armed. The man holding ............................................................................................................................ 29. It’s a terrible pity I can’t go there with you. I wish ............................................................................................................................ 30. Even though the guerrillas were short of ammunition, they won the battle. Despite ............................................................................................................................ 31. The tourists were most impressed with the castle. The castle made ............................................................................................................................ 32. Although Tuan took a taxi, he still arrived late for the interview. In spite ............................................................................................................................ 33. We ought to leave the party now if we want to catch the last train. If we don’t ............................................................................................................................ 34. Jane eats very little so as not to put on weight. Jane eats very little because ............................................................................................................ 35. “Let’s go abroad for our holiday this year” said Mr Ba. Mr Ba suggested ............................................................................................................................