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maihoanggv9x
2 năm trước
cho pt x^2 -3x +m-2 =0 gọi x1,x2 là hai nghiệm của phương trình .Tìm giá trị của m để x1^3 -x2^3 +9x1x2=81 mn giúp mình vs
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I. Choose the word whose underlined part is pronounced differently from that of the others by circling the corresponding letter A or B, C, D. 1. A. happy B. apple C. act D. aunt 2. A. mind B. bike C. fit D. tidy 3. A. school B. chair C. church D. chat 4. A. health B. team C. tea D. sea 5. A. sun B. fun C. son D. put 6. A. excited B. interested C. worried D. painted 7. A. use B. computer C. duty D. shut 8. A. chair B. fair C. pair D. are 9. A. how B. know C. town D. brown 10. A. season B. break C. great D. steak II. Choose the best answer by circling its corresponding letter A, B, C or D: 1. We always need more players. Why don’t you come ………………? A. on B. along C. with D. after 2. Will you be home …………..dinner tonight? A. to B. for C. at D. on 3. Giving a book report before the class is an interesting ………………….. A. act B. action C. activity D. deed 4. Do you go out ………..? A. in the afternoon on Fridays B. on Fridays in the afternoon C. on afternoons Friday D. on Friday afternoons 5. …………….lives in a very big house A. A Queen of England B. Queen of England C. The Queen of the England D. the Queen of England 6. On Sunday mornings I stay in bed …………..8 o’clock. A. until B. at C. from D. to 7. I often ……………in winter. A. go playing skiing B. go skiing C.play skiing D. go to ski 8. Some young peole are working ……………hospital volunteers. A. to be B. such as C. like D. as 9. We shouldn’t cross the street outside the ……………. A. pavement B. foot lane C. sidewalk D. zebra crossing 10. They …………..healthy after the summer vacation. A. looked B. were seeming C. were looking D. were appearing 11. They meet their friends and …………some fun. A. take B. have C. do D. enjoy 12. Yo should pay more …………….in class. A. part B. care C. notice D. attention 13. He and his friends usually get ……… and talk about their stamps. A. together B. themselves C. each other D. one another 14. He likes stamps. He is a stamp ………….. A. collect B. collecting C. collector D. collects 15. Some students say they are …………have no time for pastime. A. hurry B. busy C. full D. hard 16. It’s difficult to cross this street because there is too much ……….. A. crowd B. traffic C. people D. transport 17. There aren’t any good movies …………..at the moment. A. going on B. being on C. performing D. showing 18. Sorry I can’t come but thanks …………. A. any ways B. any way C. anyway D. in anyway 19. Look at ………..girl over there. A. one B. this C. that D. a 20. Would you like to come to my house for lunch? A. Yes, I do B. I’d love to C. Yes, I like D. OK. I’d like III. Give the correct form of the verbs in brackets to complete the following sentences. 1. No one enjoy (go) ……….to hospital. 2. What you (do)…………at the moment? - I (watch) ………….T.V. 3. We (be) ……………students in four years. 4. A new school (build) ………………near our school now. 5. You (be) …………..angry if he refuses to help you? 6. I will send him the message as soon as he (return)……………… 7. A little girl can’t spend all her time (listen) ……………..to stories. 8. He sent a telegram for his mother (learn) …………….good news. 9. + Where are you? 10. + I am upstairs. I (have)……………… a bath. IV. Fill in each blank with the correct form of the word given in capital: 11. My father has a …………computer. He often brings it with him when he’s away on business. PORT 12. We must remember to eat ………………... SENSE 13. The room will look brighter if there is a …………..on the wall. PAINT 14. Some of the children …………….boys, play marbles when there is a break. MAIN 15. You shouldn’t eat ……….food. HEALTH 16. We mustn’t be ……………….when we cross busy streets. CARE 17. She often feels …………………when she gets bad marks. HAPPY 18. There are about 200 ………….in this company. EMPLOY 19. Mai is ………….at math than me. GOOD 20. This lovely apartment has two bedrooms and it is …………… FURNISH V. There is one mistake in each of the following sentence. Find and correct it. 1. Tim is at the same age as Hoa. 2. At recess, the students practice to play basketball. 3. Do you know how much a banana cost? 4. The tacher says Ba will be a famous artist in one day. 5. Some boys are playing marble in the school yard at recess. 6. Some students are playing games as blind man’s buff and catch. 7. Mai learns how to use a computer in her scientific class. 8. I’d love coming to your birthday but I’m much too busy. 9. There are less TV programs for teenagers than there are for adults. 10. People are living longer so there are more and more many old people. A B C D

Huống gì thành Đại La, kinh đô cũ của Cao Vương: Ở vào nơi trung tâm trời đất; được cái thế rồng cuộn hổ ngồi. Đã đúng ngôi nam bắc đông tây; lại tiện hướng nhìn sông dựa núi. Địa thế rộng mà bằng; đất đai cao mà thoáng. Dân cư khỏi chịu cảnh khốn khổ ngập lụt; muôn vật cũng rất mực phong phú tốt tươi. Xem khắp đất Việt ta,chỉ nơi này là thắng địa. Thật là chốn tụ hội trọng yếu của bốn phương đất nước; cũng là kinh đô bậc nhất của đế vương muôn đời. (Theo Sách giáo khoa Ngữ văn 8, tập 2, trang 49, NXB Giáo dục năm 2016) 1. Chỉ ra phương thức biểu đạt chính của đoạn văn trên. 2. Văn bản được viết theo thể loại nào? Trình bày hiểu biết của em về thể loại đó. 3. Xét theo mục đích nói, câu văn: “Dân cư khỏi chịu cảnh khốn khổ ngập lụt; muôn vật cũng rất mực phong phú tốt tươi” thuộc kiểu câu gì?

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