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  Speeding off in a stolen car, the thief thinks he has got a great catch.But he is for an unwelcome surprise.The car is fitted with a remote immobilizer(锁止器), and a radio signal from a control center miles away will ensure that once the thief switches the engine off, he will not be able to start is again.

  The idea goes like this.A control box fitted to the car contains a mini-cell phone, a microprocessor and memory, and a GPS(全球定位系统)satellite positioning receiver.If the car is stolen, a coded cell phone signal will tell the control center to block the vehicle's engine management system and prevent the engine being restarted.

  In the UK, a set of technical fixes is already making life harder for car thieves.“The pattern of vehicle crime has changed,”says Martyn Randall, a security expert.He says it would only take him a few minutes to teach a person how to steal a car, using a bare minimum of tools.But only if the car is more than 10 years old.

  Modern cars are far tougher to steal, as their engine management computer won't allow them to start unless they receive a unique ID code beamed out by the ignition(点火)key.In the UK, technologies like this have helped achieve a 31% drop in vehicle-related crime since 1997.

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

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

  Staff at the center will then contact the owner to confirm that the car really is missing, and keep police informed of the vehicle's movements via the car's GPS unit.

(1)

What's the function of the remote immobilizer fitted to a car?

[  ]

A.

To allow the car to lock automatically when stolen.

B.

To prevent the car thief from restarting it once it stops

C.

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

D.

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

(2)

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

[  ]

A.

self-prepared tools are no longer enough for car theft

B.

the thief has to make use of computer technology

C.

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

D.

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

(3)

What is essential in making a modern car tougher to steal?

[  ]

A.

A GPS satellite positioning receiver.

B.

A special cell phone signal.

C.

A unique ID card.

D.

a coded ignition key.

(4)

Why does the tracking system set a 100-metre minimum before sending an alarm to the operation center?

[  ]

A.

To give the driver time to contact the operations center.

B.

To allow for possible errors in the GPS system.

C.

To keep police informed of the car's movements.

D.

To leave time for the operations center to give an alarm.

(5)

What will the operation center do first after receiving an alarm?

[  ]

A.

Start the tracking system.

B.

Locate the missing car.

C.

Contact the car owner.

D.

Block the car engine.

答案:1.B;2.A;3.D;4.B;5.C;
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