Giúp mình phần ngữ văn với Cảm ơn mn nhiều

Cách biểu diễn một công cấu tạo của hợp chất hữu cơ như thế nào? Mạch cacbon là gì? Có bao nhiêu loại mạch cacbon? Mỗi loại lấy 2 ví dụ? Viết công thức cấu tạo của: C4H8, C5H12, C4H6

III. Give the right form of the verbs in the brackets to complete the following sentences: 1. If I were you, I .....................(go) to Ha Noi with him right now. 2. If I had a wing, I.........................(not have to) take an airplane to fly home. 3. If someone ..................(enter the building, the alarm bell will go off. 4. He..................(pass) his examination if he ......................(study) hard last year. 5. If it ....................(rain) tomorrow, I will saty at home at watch TV. 6. You .........................(have) a medical degree if you want to get that job. 7. If she speaks English better, she.......................(be) chosen for that job. 8. If you don't tell the truth, we..........................( not help) you. 9. The dog is .....................so it barks......................(angry).

Cho ∆ABC có 3 góc nhọn.KẻAH vuông góc BC.Biết AB=7cm;BH=2cm;BC=13cm.Tính AH,AC

II. Change these sentences into passive voice: 1. My father waters this flowers every morning ...................................................................................... 2. John invited Fiona to his birthday party last night .................................................................................... 3.Her mother is preparing the dinner in the kitchen.  .................................................................................. 4. We should clean our teeth twice a day .......................................................................................... 5. Our teacher have explained the English grammar .......................................................................................... 6. Tom will visit his parents next month .......................................................................................... 7. Her mother used to give her some sweets after the meals .......................................................................................... 8. They are going to build a new supermarket near my house .......................................................................................... 9. We need to protect our environment .......................................................................................... 10. Do your paretns make you study hard ? ..........................................................................................

Thầy cô giải giúp em với ạ : cho a thuộc Z chứng tỏ a bình phương lớn hơn hoặc bằng 0,trừ a bình phương nhỏ hơn hoặc bằng 0

làm giúp mik từ câu số 3 đến câu 5

Your friend in England , Peter , is going to your hometown for some days . Write an e-mail ( 100 - 120 words ) to him to suggest him something

I. Put the verbs in the brackets in the corect tenses: 1. He never.....(listen) to what you say. He always .........(think) about something else. 2. We ...................(not meet) each other since we .......................(leave) school. 3. She..................... (not study)on Friday. 4. I usually ....................(have) breakfast at 7.00. 5. We (fly).................... to Spain every summer. 6. My mother .............. (fry)eggs for breakfast every morning. 7. The bank ................(close)at four o'clock. 8. Yesterday, I ...............(go) to the restaurant with a client. 9. When we.................. (arrive) at the restaurant, the place............... (be)full. 10. I ...............(not go) to school last Sunday. 11. ...........she ..........(get) married last year? 12. After she .........................(finish) her homework, she ................(go) out with her friends. 13. Yesterday, she.....................(burn) her hand while she .......................(cook) dinner. 14. Look ! Peter ........................(play)

An có 120 viên kẹo. Bình có $\frac{1}{2}$ số kẹo của An. Minh có só kẹo bằng $\frac{1}{2}$ số kẹo của BÌnh. Hỏi bình có bao nhiêu viên kẹo. Biết sau đó MInh cho An 1 viên kẹo.