một tàu tuần tra chạy ngược dòng 60 km sau đó chạy xuôi dòng 48km trên cùng dòng sông có vận tốc của dòng nước là 2 km/h tinh vận tốc của tàu tuần tra khi nước yên lặng biết thời gian ít hơn thời gian ngược dòng là 1 giờ

hai xe máy khởi hành cùng lúc từ A đến B cách nhau 120 km biết vận tốc xe máy thứ nhất hơn vận tốc xe máy thứ 2 là 6 km/h . Và xe máy thứ nhất đến B trước xe máy thứ hai là 40 phút . Tính vận tốc mỗi xe zúp mik với ạ

close down live on come back deal with get up look through pass down set off keep up with turn down 1. My sister is an early bird. She_____________at 7 o'clock every day of the week. 2. We'll_____________for Tay Ho village at 9 o'clock and arrive at 10 o'clock. 3. When I was a student, I_____________small allowances from my parents. 4. The government must now _____________the preservation of traditional craftvillages. 5. The banks have_____________a lot of branches in villages over the last few years. 6. Many foreign tourists decided to_____________to Viet Nam for another holiday. 7. They offered her a trip to Europe but she_____________it_____________. 8. He has_____________the report and found nothing interesting. 9. Phong walks too fast and it's really hard to_____________him. 10. These traditional stories have been_____________from parents to children overmany generations.

Cho a, b là hai số tự nhiên không nguyên tố cùng nhau và thỏa mãn : a=4n+3 ; b=5n+1(n ∈ N). Tìm a, b

1.Lan has been seriously stressed because of studying hard for the upcoming exam ➜Studying................................................(resulted) 2.Dave is pressed because his parent's high expectation of his study results ➜Dave parents' expectations...............................................(put) 3."My close friend and I had a quarrel last week,so I felt sad",said Mary ➜Mary said........................................... 4."I have just decided to register a dancing club to refresh myself.",said Lisa ➜Lisa said..................................................................... 5."Why don't you go out for a while to relax?",John asked me. ➜"If I...................................................",John said to me. em cần gấp lắm ạ,ai làm cành nhanh e vote 5s

giups gấp gấp quá gấp gấp gấp vote + mèo méo meo mèo meo

Bài 1: điền từ Was hoặc were lên đầu câu rồi sắp xếp lại câu cho đúng thứ tự Mẫu : at/Tom/Yesterday/school Mẫu: Was Tom at school yesterday Câu 1;a/the/tree/yesterday/on /there/cat Câu 2:Any/in/there/room/children/the/five/minutesago Câu 3;boy/the/the/at/yesterday/evening/cinema

Chứng minh rằng: (a^2 + b^2)(c^2 + d^2) = (ac + bd)^2 + (ad-bc)^2

1. They got bus and walked to the craft village. 2. The museum has been temporarily closed for reconstruction. 3. Bat Trang Ceramic Village is facing up the lack of artisans. 4. He asked her to go on a vacation with his family but she turned him . 5. Tourists coming Western countries find conical hats interesting. 6. She is used to dealing all kinds of people in her job. 7. He got to find himself alone in the house. 8. Tomorrow’s match has been called because of the icy weather. 9. I’m looking to the reunion with my family in Vietnam. 10. These traditional stories have been passed from parent to child overmany generations.

Cho 2 dụng dịch HCl ( A và B ) có nồng độ khác nhau . Hãy tính nồng độ phần trăm của A và B , biết rằng C%B =2,5 C%A .khi trộn A với B theo tỉ lệ khối lượng 7:3 thu được dung dịch C có nồng độ 25%