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 国家开放大学 / 城市轨道交通概论
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前后列车在区间内运行间距越大,通行能力越好,列车的运行速度也可发挥到最佳点,但运行安全程度越低。


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  • Many visitors to the United States find that the fast pace at which people move is very troubling. One’s first impression is likely to be that everyone is in a rush. City people always seem to be hurrying to get where they are going. And they are very impatient if they are delayed even for a brief moment. At first this may seem unfriendly to you. But drivers will rush you; storekeepers will be in a hurry as they serve you; people will push past you as they walk along the street. You will miss smiles and brief conversations with people when you shop or dine in a restaurant. Do not think it is because Americans are in such a hurry that they are unfriendly. Life is often much slower outside the big cities, which is true in other countries as well. Americans, who live in cities such as New York, Chicago, or Los Angeles, often think that every one is equally in a hurry to get things done. But when they discover that you are a stranger, most Americans bee quite kindly and will take great care to help you. Many of them first came to the city as strangers and they remember how frightening a new city can be.If you need help or want to ask a question, choose a friendly looking person and say, ”I’m a stranger here.Can you help me?”Most people will stop, smile at you, and help you find your way or answer your questions.But you must let them know that you need help.Otherwise they are likely to pass you by, not noticing that you are new to the city and in need of help.Occasionally, you may find someone too busy or perhaps too rushed to give you aid.If this happens, do not be discouraged; just ask someone else. 4. Which of the following statements is TURE according to the passage? 旅游英语1