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  3. One form of driver assistance that is sure to call one’s attention is intelligent speed adaptation (ISA) — a technology for forc

One form of driver assistance that is sure to call one’s attention is intelligent speed adaptation (ISA) — a technology for forc

admin2007-12-11  106
问题     One form of driver assistance that is sure to call one’s attention is intelligent speed adaptation (ISA) — a technology for forcing a driver to observe the speed limit. This works by building into the car a digital map marked with local speed restrictions. The addition of GPS (global positioning system) navigation tells the car what the maximum speed on any given stretch of road should be. Cars are then slowed down, or prevented from accelerating, whenever they are at or above the speed limit. One way to do this is to starve the engine of fuel. Another is to add a measure of play to the accelerator pedal (油门). A third is to make the accelerator harder to push down. In future drive-by-wire vehicles, the software would refuse requests from the accelerator pedal when above the speed limit.
    However, people have different opinions as far as ISA is concerned. Whatever their opinions are, the main justification for ISA is likely to be the high cost of speeding. Studies suggest that ISA could reduce the number of accidents by as much as 40%, and the number of fatal accidents by nearly 60%. It could also improve fuel efficiency, remove the need for enforcing speed limits with cameras and policemen, and reduce the costs of insurance.
    Trials of ISA systems have already been carried out in Sweden, Denmark, the Netherlands and Britain, and more are planned in Belgium and France. Although resistance is expected from drivers as well as from motor manufacturers, ISA could be introduced gradually, first with new cars and later as retro-fitting (改装) to the remaining old cars — rather as seatbelts were introduced a generation ago. The trials show that a surprisingly large proportion of people come to accept ISA after they have lived with it for a while — again, much like the experience with seatbelts.
One of the major reasons for having ISA fixed in a car is to______.
选项 A、replace policemen with a new device
B、warn drivers of possible accidents
C、have traffic accidents greatly reduced
D、introduce fuel-efficient equipment
答案C
解析 本题为细节题，根据文章第二段第二句中提到的“…，the main justification for ISA is likely to be the high cost of speeding”可以判断这就是安装车载ISA的主要目的。选项A意为“以新装置替代警察”，在文中仅仅是目的之一。选项B意为“警告司机可能发生的事故”，与第一段中强制司机遵守时速限制也不相符。选项D表达的“引进燃油效率装置”也只是这一装置的附加功能，而不是主要功能。因此C表达的“极大地减少超速的高昂费用”，即文中提到的交通事故减少40％和致命伤害事故减少60％，才是正确答案。
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