Aside from simply apprehending (逮捕) criminals, it’s believed this new technology could help save lives. If the police successfully fire a GPS unit at a speeding criminal, they can pull back from a high-risk chase. Chases can be incredibly dangerous to all involved, including innocent bystanders and other drivers. Once the GPS bullet connects, there’s no need for the chase any longer.

　　Now, predictably, a GPS-loaded gun isn’t cheap. Police departments need to pay about $5,000 per vehicle for the technology, and individual GPS bullets cost as much as $250 each. That may sound expensive, but remember: The alternative is often thousands of dollars in property damage, and great human cost in injury and lost life. According to Star Chase, their GPS bullet system has an apprehension rate of 80% without any report of injury or property damage.

　　If you’d like to learn more about the Star Chase system, Popular Mechanics has just published a good article about it. There’s also plenty more information available at the company’s website.

　　8. When the GPS bullet sticks to the escaping robber’s car, the police can

　　.

　　A. know the car’s condition

　　B. ensure the robber’s safety

　　C. play a fair game with the robber

　　D. know the car’s position and direction

　　9. The GPS bullets could help save lives mainly because

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