度计). In fact, it is entirely portable. It will also work with newer phones and PDAs that have built­in GPS receivers. If a driver exceeds (超过) the speed limit, the speed is shown and an alert sounds.

　　Michael Paine, an Australian vehicle design engineer and traffic safety consultant, was hired to analyze the product. He told LiveScience that his colleagues in the road safety field are "very enthusiastic" about what they're now calling "an intelligent speed alert". Other research, according to Paine, shows that 40 percent of all traffic deaths involve speeding.There is also a potentially controversial future use. "Since the system is so portable, it would be easy to make it a requirement for teenage drivers to always use a speed alert device when driving，" Paine said. "The system even has the capability to record speeding violations, so parents can monitor their teenage drivers."

　　语篇解读：本文是一篇说明文，主要对澳大利亚一家公司所生产的一种新型的预防超速驾驶的车载智能装备进行了简要的介绍。

　　5．What's the purpose of the new product?

　　A．To inform us of the new car system.

　　B．To introduce some improvements in cars.

　　C．To popularize the built­in car system.

　　D．To limit certain drivers to safe driving.

　　解析：选D　细节理解题。根据第一段中的前两句并结合第二段的内容可知，使用该新产品的目的是限制一些司机开车超速，使他们在安全速度内驾驶，故选D项。

　　6．"Lead­footed drivers" in Paragraph 1 refer to the ones ________.

　　A．who drive too carelessly

　　B．who drive over the speed limit

　　C．who are partly disabled

　　D．who drive too slowly

　　解析：选B　词义猜测题。根据第一段的第二句"When the technology becomes ... tickets and also save lives."可推知，lead­footed drivers 指开车超速的司机，故选B项。

　　7．The second paragraph mainly talks about ________.

　　A．the project of the built­in product

　　B．how the product is programmed

　　C．the functions of GPS in cars

D．why the system becomes popular