user-avatar
nguyentiendat.a9pbc2020
2 năm trước
một xe ô tô đi từ a đến b dài 110 km với vận tốc và thời gian đã định . sau khi đi đc 20km thì gặp đường cao tốc nên ô tô đạt vận tốc 9/8 vận tốc ban đầu . do đó đến b dự định sớm hơn 15' . tính vận tốc ban đầu
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

1Alice's strange ideas astonished everybody.-> Everybody * 2 They planted green trees around their house. -> Green trees * .3They are going to build a new theater. -> A new theater 4 Someone left the purse in the classroom. -> The purse * 5. The students in my class are going to organize a surprise party this evening.-> A surprise party * 6They have awarded Andrew a prize for his essay. -> Andrew * 7The police are interviewing the suspects.-> The suspects * 8The pollution in the city is affecting people's breathing. -> People's breathing * 9I have already done my homework.-> My homework * 10 How do people make candles? -> How are * 11 Who invented the telephone?-> By * 12 The scientists have studied the problem carefully. -> The problem * 13 He asked me to send a stamped envelope.-> I * 14. John delivers the newspapers every morning. -> The newspapers 15. My father wrote that letter, -> That letter * 16. He is asking me a lot of questions. - 17 She was doing her homework at that time.-> Her homework* 18. My mother has made that cake.-> That cake * My friend can answer this question.-> This question * 4 points 20. The manager should sign these contracts today.-> These contract 21. My mother made this cake. -> This cake 22. The police found him in the forest.-> He *. 23 Someone has sent me the flowers. -> I * 24. My parents are going to buy a car tomorrow.-> A car * 25. They can't make tea with cold water.-> Tea *

2018 © Loga - Không Ngừng Sáng Tạo - Bùng Cháy Đam Mê
Loga Team