But determined criminals are still managing to find other ways to steal cars, often by getting bold of the owner s keys. And key theft is responsible for 40%of the thefts of vehicles fitted with a tracking system.

　　If the car travels 100 metres without the driver confirming their ID, the system will send a signal to an operations centre that it has been stolen. The hundred metres minimum avoids false alarms due to inaccuracies in the GPS signal.

　　Staff at the centre will then contact the owner to confirm that the car really is missing, and keep police informed of the vehicles movements via the cars GPS unit.

　　31.Whats the function of the remote immobilizer fitted to a car?

　　A) To help the police make a surprise attack on the car thief.

　　B) To allow the car to lock automatically when stolen.

　　C) To prevent the car thief from restarting it once it stops.

　　D) To prevent car theft by sending a radio signal to the car owner.

　　32.By saying The pattern of vehicle crime has changed(Lines 1-2. Para. 3), Martyn Randall suggests that ________.

　　A) it takes a longer time for the car thief to do the stealing

　　B) self-prepared tools are no longer enough for car theft

　　C) the thief has to make use of computer technology

　　D) the thief has lost interest in stealing cars over 10 years old

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