1)Viết công thức cấu tạo(CTCT rút gọn):CH4,CH3OH,C2H6,C4H8,C4H10,C3H80 2)Tính phần trăm các nguyên tố C,H trong hợp chất:C2H60,C6H1206

giải thích bút danh Tô Hoài được lấy từ đâu? giải thích nhan đề Dé Mèn phiêu lưu kí

II. 1. expressions children’s vertical creative environment later types opportunities construct activities Children love to build and make things. This love for building is first seen in (1).......actions.as they make things in a horizontal fashion and (2).............,as older children, they pile things one on another in a (3).............fashion. This love for building is seen around the (4)................where ever young children are found. With legos, nesting blocks and all (5).......... of other things. Children build and (6).......... the world in which they play. Constructing carries with it a host of exciting (7)..........to develop, practice and master various understandings, skills and attitudes. The activities include making snowflakes, drawing children and animals’ bodies, experiencing (8)................, building groups of objects, investigating plant and animal life forms, understanding word study, obeying safety and danger signs, imitating the movements of common items found in homes, watching television and numerous positional(9).......... The world of building comes alive as children become immersed in the sea of (10).........things.

tìm x ∈ z biết 4 (x - 3 ) - 2 (x - 4) = 12 em ko hiểu bài này ạ

Giúp em với ạ, hứa sẽ trả ctlhn ạ

Một tờ bìa hình chữ nhật có chiều dài 35cm; chiều rộng 14cm. Trong tờ bìa đó, người ta vẽ một hình tròn có diện tích bằng 35% diện tích tờ bìa. Hãy tính diện tích tờ bìa còn lại.

Cơ quan nào sau đây của người nằm trong khoang ngực ? A. Tim, phổi, gan, dạ dày. B. Tim, phổi, khí quản, thực quản. C. Tim, phổi, thực quản, dạ dày. D. Tim, phổi, khí quản, dạ dày.

Bài 1: Cho 32g Cu tác dụng với O2 thu được CuO a) PTHH b) Tính thể tích O2 cần dùng? đktc? c) Tính khối lượng CuO thu được Bài 2: Hòa tan 13g Zn bằng axit H2SO4 thu được ZnSO4 và H2 a) PT b) Thể tích khí H2 sinh ra ở đktc c) Tính khối lượng H2SO4 phản ứng

Viết 1 bài văn về tình cảm của mình đối với trường. Ko chép mạng

1. Finish the following sentences in such a way that it means exactly the same as the sentences printed before . (2 points) 1. Your hair looks too long. You should have it cut soon. -> Your hair looks too long. You......................................................................... 2. It’s essential that children have the same educational opportunities. -> Children need....................................................................................................... 3. Because of Mary’s shyness, she didn’t have many friends. -> Mary didn’t.......................................................................................................... 4. “Karen won’t be here tomorrow.” Ann told me. -> Ann said............................................................................................................................ 5. Penguins cannot fly. -> It is impossibble.................................................................................................... 6. Most parents spend little time talking to their kids. -> Most parents do......................................................................................... 7. You need to put on more warm clothes. It’s cold outside. -> It’s necessary.............................................................................................. 8 Tom is absent today, because he is ill. -> Because of.................................................................................................. 9. “Meet me at the gate of my school!” Sue said -> Sue told me.................................................................................................. 10 I couldn’t speak English until I entered secondary school. -> I was ................................................................................................... 11 1. In general, attending kindergarten in the US is voluntary. -> Attending kindergarten in the US ........................................................ 12. You need to put on more warm clothes. -> It’s necessary.............................................................................................. 13. Tom is absent today, because he is ill. -> Because of.................................................................................................. 14. “Tickets will be on sale here next Friday!” Nick said -> Nick said that.............................................................................................. 15. My son couldn’t talk until he was at the age of two. -> My son was ................................................................................................