user-avatar
phamthimo10012001
2 năm trước
Một người lái ô tô đi từ A đến B với vận tốc 60km/h. Sau khi đến B và nghỉ lại ở đó 30 phút, ô tô lại đi từ B về A với vận tốc 40km/h. Tổng thời gian cả đi lẫn về là 8h15 phút ( kể cả thời gian nghỉ ở B). Tính độ dài quãng đường AB.
Thích Trả lời Chia sẻ

Các câu hỏi liên quan

8. When Jack ______ me, I ______ a letter. A. was phoning / wrote B. phoned / has been writing C. phoned / was writing D. has phoned / was writing 9. If you ______ to my advice in the first place, you______ in this mess right now. A. listen/ won’t be B. had listened/ wouldn’t have been C. will listened/ wouldn’t be D. had listened/ wouldn’t be 10. _______________our poor living conditions, we all feel happy. A. However B. Although C. Despite D. Because 11. She is looking _____ a new place to live because she does not want to depend ____ her parents any more. A. for / on B. after / with C. up / forward D. at / into 12. We bought some …………………………… A. German old lovely glasses B. lovely old German glasses C. German lovely old glasses D. old lovely German glasses 13. ASEAN has emphasized cooperation in the "three pillars" of security, socio cultural and economic _______ in the region. A. organization B. production C. integration D. establishment 14. Mrs. Pike is a feminist, who ________ that women should be offered the same job opportunities as men. A. varies B. advocates C. leads D. votes 15. The explorers made a fire to _______ off wild animals. A. get B. go C. take D. keep 16. He is a great sports _______. He rarely misses any sport games although he was busy. A. enthusiast B. player C. energy D. programmer 17. Education has been developed in _______ with modern industry and the mass media. A. compulsory B. parallel C. selected D. following 18. Daisy has been out of work for 3 months. She stay at home and does the housework_______. A. disappoint B. disappointed C. disappointedly D. disappointing 19. Reagan__________ an actor years ago. A. is said to be B. was said being C. was said have been D. is said to have been 20. John was the last applicant _______ for a position in that energy station. A. to interview B. which is interviewed C. interviewing D. to be interviewed 21. _________ breakfast is ______ first meal of the day. A. X /the B.The /the C.A/ no article D. The / X

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