Cho phương trình...tìm m để pt có 2 n pb x1,2 thỏa mãn....

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Bài 2 Trái đất trẻ của bạn trẻ năm châu Vàng, trắng, đen, …. dù da khác màu Ta là nụ, là hoa của đất Gió đẫm hương thơm, nắng tô thắm sắc Màu hoa nào cũng quý, cũng thơm! Màu hoa nào cũng quý, cũng thơm! (Bài ca về trái đất – Theo Định Hải) a) Từ “ta” trong đoạn thơ dùng để chỉ ai? Từ đó thuộc từ loại nào? b) Đặt một câu có chứa từ đồng âm với từ “sắc” có trong đoạn thơ c) Đoạn thơ trên sử dụng những biện pháp nghệ thuật nào? d) Em hãy nêu ý nghĩa của việc lặp lại câu cảm ở cuối đoạn thơ.

Giải HPT $\left \{ {{2x^2+5xy +2y^2 +x+y+1=0} \atop {x^2 + 4xy + y^2 + 12x +12y +10=0}} \right.$

dẫn từ từ 112cm3 khí co2 qua 200ml dd nước vôi trong nông độ aM ta thấy không có khí thoát ra và thu đc 0,1 g kết tủa .tìm a

Make the letter A. B. Car Dan your answer sheet to indicate the correct answer to each of the questions (4.0 points) Question 1: It Jenny wishes she......5 inches taller A.is B. will be C.were D.are Question 2: Old Jack used to.......20 cigarettes a day. A. smoked B.smoke C.smoking D.to smoke Question 3 This car.......in Japan seven years ago. A. was made B.made C.has been made D.is made Question 4: The children will stay at home if it....... tomorrow A. snow B.will snow C.snows D.snowing Question 5: When we.........,the building had been pulled down A. were arriving B.arrived C. had arrived D.to arrive Question 6: I feel.......now because I have passed an important esam A.tense B. frustrated C. delighted D.bored Question 7: They keep changing the decoration of the shop.....attract mane young people A. so that B. because C. although D.so Question 8: Have you got.......the jetlag? A. from B.into C.up D.over Question 9: This laptop is much more user-friendly, but it costs.......... the other one A. so much as B.as many as C.too much D. twice as much as Question 10: The flower was......... out of a single piece of valuable wood. A.bicycle B.rickshaw C. cast D. carved Question 11: It's a great experience to be sitting comfortably in a......... pulled by someone through the ancient streets. A. carve B. moulded C.car D. train Question 12: Working in a place full of hustle and bustle like this, I can't help missing my tranquil and........village A. picturesque B.modem C.loud D.uply Question 13: The scenery is........ when viewed from the mountain top. It feels like your breath is being taken away A.nice B. good C.spectacular D. peaceful Question 14: The paintings........ Mr. Brown has in his house are worth around £100,000. A.whose B.which C.what D.who Question 15: If you want to stay slim and healthy, you.......... reduce the amount of fast food you eat every day. A.may B.should C.need D.would Question 16: In........,students can study a work sector like applied business, design, health, or tourism. A.vocational subjects B.academic subjects C.applied approach D.schedule Question 17: What will you do to earn.....? A.life B.a living C.a job D.a carcer Question 18: I'm interested in doing....... so I can stay at home in the evening A.night-shifts B.an evening course C.something D.a nine-to-five job Question 19: "Who will look........the baby when we are away, Jane?" the husband asked. A. at B.into C.up D.after Question 20: Fashion........have made different styles of the no dai over the past decades. A.scientists B.odesigners C. engineers D. architects

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giúp vs ạ 11.My mother hasn’t worn Ao Dai _____ at least ten years. A. in B. on C.for D.since 12.I wish you ________ do the house work tomorrow. A. didn’t have to B.wouldn’t have to C. don’t have to D.hadn’t to 13.____ have fashion designers done to modernize the Ao Dai ? A. How enient B. What C. Why D. Where 14.Nguyen Du is considered a famous Vietnamese _______. A .poetry B. poem C. poet D.poetic 15.It’s ____ to call anyone at night A .beautiful B. traditional C. casual D.inconvenient 16.The Ao Dai is the ___ dress of Vietnamese women. A .convenient B. baggy C. traditional D. modern 17.How many cups off coffee ___ today ? A .are drunk B. have been drunk C.were drunk D. drank 18.When was the last time you ___ to the zoo? A .went B. going C. be D. being 19.The traditional Ao Dai used ____ by both men and women. A .to being worn B. to wear C.to have worn D.to be worn 20.This is my favorite short ____ blouse. A .sleeved B. sleeve C. sleeving D. sleeves

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