第15题: [单项选择]Despite their varied designs, navigation computers used in cars ______. A. are more or less the same price B. provide directions in much the same way C. work on more or less the same principles D. receive instructions from the same satellites 参考答案:C 答案解析:细节理解题。文章第五段第一句中“basically identical”与选项C表述中的“same principles”相吻合,故为正确答案。