Cho hình chóp S.ABCD có đáy là tứ giác lồi. gọi M và N lần lượt là trung điểm nằm trên hai cạnh SC và CD mặt phẳng (P) đi qua MN và // với AC

1-2-3+4+5-6-7+8+...+801-802-803+804 giúp vs ạ

Nêu nội dung cải cách hành chính của vua lê thái tông. Hành chính thôi ạ, đừng copy cả bài dài :(

Gải hộ minhg bài này với ạ Cần gấp Cảm ơn nhiều ạ❤

: Trong phòng thí nghiệm từ 1,5.1023 phân tử KClO3; 2,1.1023 phân tử CaCO3 và 2,7.1023 phân tử KMnO4 người ta điều chế được bao nhiêu dm3 khí oxi ở đktc? ( Lấy N = 6.1023 ). A. 25,2 dm3. B. 16,8 dm3. C. 13,44 dm3. D. 19,32 dm3.

finish the second sentences so that is has a similar meaning to first one , beginning with the given words 1. Finding a decent place to live in a slum is not easy ->It is 2.I fell asleep because the film was boring -> it was such 3.They have given me two interesting books -> Two Combine two sentences into a new one using the given words in brackets . Do not change the given words in any ways 4. she want to dye her hair . she will ask her mom to do it for her (get her mom) -> 5.Lily told us the truth. Everyone believes that ( Lily is belived) -> 6.There is a sign. It says we can't play cards in here(that) -> 7.No one can enter this area . The police won't allow it(forbid) -> giúp mình với ạ

Giúp e giải bài 3 và bài 4 được k ạ???

  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) a piece of his favourite music. 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 ? .......................................................................................... 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 ..................(enter0 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). IV. Give the right forms of the words in brackets: 1. Don't speak so ..................... . I can't understand you. (fast) 2. The bus driver was ..............injured because he is not a ...............driver. (serious) 3. Robin looked ....................and....................gave me that letter, this morning. (sad) 4. I'm pleased the plan worked so .......................(good) 5. I can play the guitar .............................(good) 6. I have a ........................book. (beauty) 7. The class is ............... loud today. (terrible) 8. Max is a .............. singer. (good) 9. You can ... ...............open this tin. (easy) 10. It's a ................ day today. (terrible) 11. She sings the song .............. . (good) 12. He is a ................ driver. (careful) 13. He drives the car .............. (careful) 14. My children are so ...........in the cartoons because they find these film very ..............(interest). V. Supply the correct form of the word in the parentheses 1. They used to (go/going/to go/went) to Da Lat when we were young

Viết đoạn văn (khoảng 10- 12 câu) miêu tả một đêm trăng nơi em ở.

Đốt cháy hoàn toàn m gam hợp chất hữu cơ X cần 9,6g oxi thu được 8,8g khí cacbon đioxit 5,4g nước A tính m B tính % khối lượng của các nguyên tố trong X