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littlecutemonkey2004
2 năm trước
Hai xe ôtô xuất phát cùng lúc từ hai bến A và B cách nhau 10km ngược chiều. Xe ôtô thứ nhất chuyển động từ A với vận tốc 30km/h đến B . Xe thứ hai chuyển động từ B về A với vận tốc 40km/. Chọn gốc tọa độ A , gốc thời gian là lúc hai xe xuất phát , chiều dương từ A đến B .phương trình chuyển động của hai xe là Giúp dùm em
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I. Read the text and choose the correct answer If you enjoy cycling for pleasure, doing it in London can be a shock. There are not enough lanes especially for bikes, and making your way through the traffic can be very risky. But if you have great passion, cycling in London can be exciting, and it is an inexpensive way of keeping fit if you live there. Some cyclists don’t mind spending a lot of money on expensive bikes. However, if you just want a basic bike that is only for occasional use, there are many cheap choices. Several markets have cheap bikes on sale which may not be impressive to look at but should be satisfactory. You should buy a cycling helmet if you want to cycle in London. Wearing a cycling helmet is not compulsory in Britain, but it is a good idea to wear one for protection. 1. What is the main idea of the passage? A. Cycling helmets B. Cheap bicycles C. Bicycle markets D. Cycling in London 2. According to the passage, cycling in London is A. easy B. difficult C. tiring D. boring 3. The word “it” in line 3 refers to A. cycling B. passion C. excitement D. doing exercise 4. The difficulty of cycling in London is described in lines A. 2 B. 5 C. 5-6 D. 8-9 5. According to the passage, all the followings are true EXCEPT that A. It is compulsory to wear a helmet when cycling in Britain. B. Some bikes in London are cheap. C. There are not many lanes especially for bikes. D. Some cyclists don’t want to buy expensive bikes.

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