a, Sự co dãn của ruột có tác dụng như thế nào trong quá trình tiêu hóa? b, Với một khẩu phần ăn có đầy đủ các chất, hãy cho biết những loại chất nào trong thức ăn cần được tiêu hóa hóa học tiếp sau sự tiêu hóa ở khoang miệng và sau sự tiêu hóa ở dạ dày?

một người đi từ A →B.Trong 2/3 quãng đường đầu người đó đi với vận tốc 20km/h,quãng đường còn lại người đó đi với vận tốc 30km/h .Hỏi trên lí thuyết người đó đi với vận tốc trung bình bao nhiêu km/h (biết thời gian trong lí thuyết =thời gian thực tế ngườ đó đi) help me i give 5 sao

Ai giúp em 2 câu này với ak Dùng hằng đẳng thức càng tốt an

Exercise 5: Choose the best answer to rewrite the original one. 1. "Don't forget to clean your teeth," said Glanny to Helen. A. Granny told Helen not to forget to clean her teeth. B. Granny told Helen to not forget to clean her teeth. C. Granny said to Helen not to forget to clean her teeth. D. Granny told Helen not forget to clean her teeth. 2. "Don't sit up late," said the doctor to Mary. A. The doctor told Mary not sit up late. B. The doctor told Mary not to sit up late. C. The doctor said to Mary not to sit up late. D. The doctor told Mary to not sit up late. 3. The doctor said to Pete, "Don't go for a walk today." A. The doctor told Pete not to go for a walk today. B. The doctor told Pete not go for a walk today. C. The doctor said to Pete not to go for a walk that day. D. The doctor told Pete not to go for a walk that day. 4. "Don't eat too much ice-cream," said Nick's mother to him. A. Nick's mother said him not to eat too much ice-cream. B. Nick's mother told him not to eat too much ice-cream. C. Nick's mother told him not eat too much ice-cream. D. Nick's mother told him to eat not much ice-cream. 5. "Explain to me how to solve this problem," said my friend to me. A. My friend told me to explain to him how to solve that problem. B. My friend told me to explain to me how to solve that problem. C. My friend told me explain to him how to solve that problem. D. My friend told me to explain to him how solve that problem. 6. The woman doctor said to Peter, "Open your mouth and show me your tongue." A. The woman doctor told Peter open his mouth and show her his tongue. B. The woman doctor said Peter to open his mouth and show her his tongue. C. The woman doctor told Peter to open his mouth and show her his tongue. D. The woman doctor told Peter to open her mouth and show him his tongue. 7. "Don't be afraid of my dog," said the man to Kate. A. The man said to Kate not to be afraid of his dog. B. The man told Kate not be afraid of his dog. C. The man told Kate not to be afraid of her dog. D. The man told Kate not to be afraid of his dog. 8. "Take this book and read it," said the librarian to the boy. A. The librarian told the boy to take that book and read it. B. The librarian told the boy to take this book and read that. C. The librarian said to the boy to take that book and read it. D. The librarian told the boy take that book and read it. 9. He said to us, "Come here tomorrow." A. He told us go there the next day. B. He told us to go here the next day. C. He told us to go there the next day. D. He said to us to go there the next day. 10. I said to Mike, "Send me a telegram as soon as you arrive." A. I told Mike to send me a telegram as soon as he arrived. B. I told Mike to send me a telegram as soon as he arrives. C. I told Mike to send me a telegram as soon as I arrived. D. I told Mike to send me a telegram as soon as I arrive.

Exercise 4: Choose the best answer to rewrite the original one. 1. Father said to me, "Don't stay there long." A. Father told me not stay there long. B. Father told to me not to stay there long. C. Father told me not to stay there long. D. Father said to me not to stay there long. 2. Peter said to them, "Don't leave the room until I come back." A. Peter told them not to leave the room until he came back. B. Peter told them not to leave the room until he comes back. C. Peter told them not to leave the room until they came back. D. Peter told them not to leave the room until they came back. 3. "Take my luggage to Room 145, " he said to the porter. A. He told the porter take his luggage to Room 145. B. He said the porter to take his luggage to Room 145. C. He told the porter to take his luggage to Room 145. D. He said to the porter to take his luggage to Room 145. 4. He said to me, "Ring me up tomorrow." A. He told me to ring him up the following day. B. He told me ring him up the following day. C. He told to me to ring him up the following day. A. He told me to ring me up the following day. 5. "Bring me a cup of black coffee." A. She told the waiter to bring me a cup of coffee. B. She told the waiter to bring her a cup of coffee. C. She told the waiter bring her a cup of coffee. D. She told the waiter bring me a cup of coffee. 6. The teacher said to me, "Hand this note to your parents, please." A. The teacher asked me to hand that note to my parents. B. The teacher asked me hand that note to my parents. C. The teacher asked me to hand that note to his parents. D. The teacher asked me hand that note to his parents. 7. "Please help me with this work, Henry," said Robert. A. Robert asked Henry help him with that work. B. Robert asked Henry to help me with that work. C. Robert asked to help Henry with that work. D. Robert asked Henry to help him with that work. 8. "Please bring me some fish soup.", he said to the waitress. A. He asked the waitress to bring him some fish soup. B. He asked the waitress bring him some fish soup. C. He asked the waitress to bring her some fish soup. D. He asked the waitress bring her some fish soup. 9. "Don't worry over such a small thing," she said to me. A. She told me not worry over such a small thing. B. She told me to not worry over such a small thing. C. She told me not to worry over such a small thing. D. She told not to worry over such a small thing. 10. "Please don't mention it to anybody," Mary said to her friend. A. Mary asked her friend not to mention it to anybody. B. Mary asked her friend not mention it to anybody. C. Mary asked her friend to not mention it to anybody. D. Mary asked her friend did not mention it to anybody.

6. Because he didn’t do his homework, he was punished Because of……………………………………………………………………………. 7. Because the test is very difficult, I can’t do it. Because of ....................................................................................................................... 8. Because I was sick, I couldn’t go to school yesterday. Because of ..................................................................................................................... 9. We couldn't do this exercise. This exercise …………............................................................................................... 10. They have built a new school in this area. A new school ………………………………………………………………………. giúp moik vs ạ cảm ơn

Mọi người giải giúp em bài này với ạ

Calli "Đắng" hoặc vẽ mèm khóc ;-; NL: Đắng lòng thanh niên muốn xem livestream nhưng bị em gái mượn máy để học :>

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions. Question 38. Hoa went to bed early. She was tired. A. Although Hoa was tired, she went to bed early. B. Hoa went to bed early so she was tired. C. Hoa went to bed early because she was tired. D. Hoa was tired but she went to bed early. Question 39. He behaved in a very strange way. That surprised me a lot. A. What almost surprised me was the strange way he behaved. B. He behaved very strangely, which surprised me very much. C. His behavior was a very strange thing, that surprised me most. D. His very strange behavior was surprised to me. Question 40. He was successful because he was determined to pursue personal goals. He was not talented. A. His determination to pursue personal goals made him successful and talented. B. It was his determination to pursue personal goals, not talent, that contributed to his success. C. His success lay in his natural ability, not in his determination to pursue personal goals. D. In addition to his determination, his talent ensured his success in pursuing his goals.

Giúp mình với ạ, có thể mình xem tin nhắn hơi trễ nhưng hứa sẽ vote 5 sao ạ