问题
单项选择题
一段路程分为上坡、平路、下坡三段，路程长之比依次是1：2：3。小龙走各段路程所用时间之比依次是4：5：6。已知他上坡时速度为每小时3千米，路程全长是50千米，小龙走完全程用多少小时（）
A.A
B.B
C.C
D.D
答案
参考答案：A
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一段路程分为上坡、平路、下坡三段，路程长之比依次是1：2：3。小龙走各段路程所用时间之比依次是4：5：6。已知他上坡时速度为每小时3千米，路程全长是50千米，小龙走完全程用多少小时（）
A.A
B.B
C.C
D.D
参考答案：A
| 阅读理解。 | ||||||||||
| The 30th Olympic host (主办) city, London, is opening its arms to the world. It's the capital city of the UK and one of the business centers in the world. It has a history of more about 2000 years. Many places of London were once villages. Today, London is a growing city with about 7 million people. They came from all parts of the world. Their ways of life are not the same but harmonious (和谐的). Their favorite food is pie and mashed potato. The symbol of London is a red double-deck (双层) bus. It came to London in 1956 and was in use there until 2005. Now it only runs on two main streets in the center of London. Let's look forward to London's wonderful show next year! | ||||||||||
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