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  3. When Melissa Mahan and her husband visited the Netherlands, they felt imprisoned by their tour bus. It forced them to see the ci

When Melissa Mahan and her husband visited the Netherlands, they felt imprisoned by their tour bus. It forced them to see the ci

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问题     When Melissa Mahan and her husband visited the Netherlands, they felt imprisoned by their tour bus. It forced them to see the city according to a particular route and specific schedule—but going off on their own meant missing out on the information provided by the guide. On their return home to San Diego, California, they started a new company called Tour Coupes. Now, when tourists in San Diego rent one of their small, brightly coloured three-wheeled vehicles, they are treated to a narration over the stereo system about the places they pass, triggered by Global Positioning System (GPS) satellite technology.
    This is just one example of how GPS is being used to provide new services to tourists. "What we really have here is a technology that allows people to forget about the technology," says Jim Carrier of IntelliTours, a GPS tourism firm which began offering a similar service over a year ago in Montgomery, Alabama. The city is packed with sites associated with two important chapters in American history, the civil war of the 1860s and the civil-rights movement a century later. Montgomery has a 120-year-old trolley system, called the Lightning Route, which circulates around the downtown area and is mainly used by tourists. On the Lightning Route trolleys, GPS-triggered audio clips point out historical hotspots.
    Another GPS-tourism firm is GoCar Rentals, based in San Francisco. It provides open-air vehicles, using a scooter engine with a fibreglass frame, similar to those used by Tour Coupes. Customers must follow a prescribed route to hear the GPS-triggered information. This limits the scope for exploration, but Nathan Withrington, the firm’s founder, says that people tend to visit the same few sites.
    Other firms, such as CityShow in New York and GPS Tours Canada in Banff, Canada, offer hand-held GPS receivers that play audio clips for listening to while walking or driving. In South Africa, Europcar, a car-rental firm, offers a device called the Xplorer. As well as providing commentary on 2,000 points of interest, it can also warn drivers if they exceed the local speed limit.
    If such services prove popular, the use of dedicated audio-guide devices could give way to a different approach. A growing number of mobile phones have built-in GPS or can determine their locations using other technologies. Information for tourists delivered via phones could be updated in real time and could contain advertisements. "Location-based services" , such as the ability to call up a list of nearby banks or pizzerias, have been talked about for years but have never taken off. But aiming such services at tourists makes sense—since people are more likely to want information when in an unfamiliar place. It could give mobile roaming a whole new meaning.
The best title for the passage is
选项 A、Roaming Holidays.
B、Joyful Holidays.
C、Satellite Tracking.
D、GPS Services.
答案A
解析 主旨题。本文开篇由Melissa Mahan的旅游经历引出其所创办的公司Tour Coupes，介绍其由全球定位系统(GPS)卫星技术启动的特色讲解服务。之后引出对GPS服务于旅游业的情况介绍，分别介绍了IntelliTours旅游公司，GoCar公司，CityShow公司，GPS Tours Canada公司以及Europcar公司的GPS旅游服务。末段谈及更多的GPS服务应用情况。全文的两个关键词分别是GPS和tourists；由末句结尾可知，正是游客有了GPS服务，才能够在假日悠闲漫步，故A符合文意。
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