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giúp mk với, nhanh nha, mk đg cần lắm

Chu vi một mảnh vườn hình chữ nhật là 45m. Biết chiều dài hơn chiều rộng 5m. Nếu gọi x(m) là chiều rộng mảnh vườn (x > 0) thì phương trình của bài toán là

đang cần gấp, mọi người giúp em

Vảy sừng của Thằn lằn bóng có vai trò gì?

ai giải hộ chi tiết giúp mình với

1.Loài nào sau đây có quan hệ họ hàng gần với cá ngựa nhất? A. Cá chim B. Cá sấu C. Cá heo D.Ngựa

Hãy nêu cách làm 1 bài cảm thụ văn hoc. Cho ví dụ

làm hộ mình ý c ạ Mình cho câu trả lời hay nhất MÌNH CẢM ƠN TRƯỚC

1. “My car broke down when I was leaving Detroit”. “……………….., we’d…………….you up” a. If we had known/ pick b. had we known/ have picked c. If we’d known/ picked d. if we knew/ pick 2. “Have you ever played bridge ?”- “Yes, we…………all the time when I was in college a. would have play b. had played c. used to played d. have played 3. The cattle drank from a river polluted with toxic chemicals a. waste b. colorless c. odorless d. poisonous 4. This park is the orphanage where lots of orphaned and abandoned animals are taken care of. a. looked after b. involved in c. dealt with d. moved in 5. Scientists are now researching new measure to prevent ……levels from rising a. pollute b. polluted c. polluting d. pollution 6. Tourists go to Cuc Phuong National park to look………..the 1.000 year-old tree. a. at b. for c. up d. after 7. Language and music make humans different …… all other animals a. of b. with c. from d. by 8. Music can be used to express one’s …… a. friends b. friendly c. befriend d. friendship 9. Music plays a very important …… in our life a. part b. section c. area d. field 1o. Music adds …… to the atmosphere of a festival a. sadness b. joyfulness c. disappointment d. happy 11. Folk music …… babies to sleep a. makes b. wakes c. lulls d. lets 12. Music in general and pop music in particular makes people …… a. excite b. exciting c. excited d. excitement 13. I listen to music …… feel relaxed a. so as to b. in order for c. as so to d. so as for 14. “…… is your favourite Vietnamese singer?” – “Trong Tan and My Linh” a. What b. Who c. Whom d. Whose 15. “…… do you like classical music?” – Because it helps me relax a. How b. What c. Which d. Why 16. We started early in order …… miss the first part of the concert a. to not b. not to c. no for d. for no 17. Would you like to go out …… a meal tonight, Joan? a. to b. for c. with d. of 18. …… was “Heal the World” written? a. Who b. Whom c. By who d. By whom 19. …… is it from here to the theatre? a. How b. How long c. How far d. How often 20. I’m saving money …… a cassette player a. buying b. in buying c. to buy d. for buy 21. “…… are you learning Chinese for?” – “To sing Chinese songs” a. What b. Why c. How d. Which