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  3. Computers in Cars You’re far from home on a lonely road. Shadowy forests stretch away on both sides. A thick mist (雾) makes it

Computers in Cars You’re far from home on a lonely road. Shadowy forests stretch away on both sides. A thick mist (雾) makes it

admin2009-06-15  52
问题             Computers in Cars
You’re far from home on a lonely road. Shadowy forests stretch away on both sides. A thick mist (雾) makes it difficult to see far beyond your car’s windshield (挡风玻璃).
"Can this be route 90A?" you wonder. If it is, you should be near a town. Yet there’s no hint of one. Night is closing in, and you’re low on gasoline.
This is a situation where an in-car computer that can navigate would be a big help.
A car computer that navigates? Yes! Such computers exists. Several experimental models are being tested by General Motors, Ford, Chrysler, and several foreign car markets. These computers vary in details. But they all contain series of maps on Vediodiscs or videotapes. For example, one computer system contains 13,300 maps covering the continental US.
Before starting out on a trip, a driver can type in the code for the region he or she plans to drive through. The computer then shows a map of that region. At the same time, a tiny radio receiver linked to the computer goes to work. It picks up signals from navigation satellites such as the NAVSTAR network. Using these signals, the computer shows a the car’s position at all times and displays this position on the map. The computer can also calculate and display the best route to follow.
A navigation computer may also receive and use data about road construction, weather conditions, and traffic jams. This information would be displayed to the driver and the computer would also use the information to work out alternate (交替的) routes.
Most cars nowadays also contain computers that help cars run more efficiently. Microprocessors (微处理机的) control certain engine functions by regulating the mixing of fuel. Data on car speed, oil pressure, revolutions per minute, engine temperature, and fuel level’ can be displayed as digital data (numbers) or warming lights.
Some auto designers suggest that a central computer display can be used to clearly present such timely information as car speed and fuel level. Warning lights would indicate a drop in oil pressure or a sudden rise in engine temperature. To get more information on these conditions, the driver would call it up on the computer display screen. When needed, the computer could be "asked" to provide navigation aid or information about the car’s condition.
选项 A、make us believe how complex the highway computer network is
B、let us know how in-car computers are linked to road signs
C、Show us how helpful a navigation computer would be
D、tell us that NAVSTAR has come into use
答案C
解析 借助题干十的核心结构(alostdriver。ntheroad)作为答案线索，这样发现答案相关句：“Can this be route 90A?’’you wonder．If it is，you should be near a town．Yet there’s no hint of one．  (该划线句的内容表明“你”在公路上驾车迷路了)Night is closing in, and you’re low on gasoline．This is a situation where an in-car computer that can navigate would be a big help．描述了具体细节信息后往往会出现总结/概括性的话语，上面这个划线句的出现就符合这个逻辑安排特点。划线句说在这样的情况下(司机迷路)车载导航系统能起很大的帮助，这与D的含义一致。
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本试题收录于： 职称英语理工类C级题库职称英语分类
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