阅读理解

　　A young girl and a man were recently found murdered in a parked car in a Boston suburb．The police found no sign in the car．Then they found a witness who had seen a car pass by the murdered couple’s car．His description placed the car as a 1950 or 1951 Chevrolet．

　　Ordinarily, searching through the files for owners of elderly Chevrolets would have been an impossible difficult task because there were two and a half million such cars．In this case, however, the police had a powerful tool－the computer．

　　The Boston Registry of Motor Vehicles programmed its computer to screen all 1950 and 1951 Chevrolets within a fifteen-mile radius(半径)of the suburb－the area in which the police believed the murderer was most likely to be found．Within minutes, the computer uncovered one thousand of wanted cars．A few hours of hand screening turned up a 1950 Chevrolet owner who lived close to the scene of the crime(犯罪)and who had received many traffic tickets．He was among the first suspects(嫌疑犯)to be investigated, and signs connecting him with the murdered couple were found．He was arrested, and is now waiting for trial．

　　本文描述了一个借助于先进的电脑技术得以迅速破案的事情。一个女孩和一个男子被杀害于车中。警方了解到一辆1950年或1951年制造的Chevrolet牌的车似乎与这件事有牵连。于是借助电脑迅速确定了嫌疑车辆并将嫌疑犯迅速捉获。