该题为排除型选择题，正确选项B 所给的satellite在录音中完全没有提及， 这逐一排除录音中所提到的项目后可以得出。解答该题需要抓住Google’s driverless cars rely on之后的内容。

[重点难点]
对 rely on ( 间接提示性语言）敏感，根据此后听到的项目排除错误选项。

[录音原文]
After several years of testing self-driving cars on freeways, where driving conditions are more predictable, Google shifted its focus to city-street driving. Google's driverless cars rely on video cameras, radar sensors, lasers and a database of information collected from manually driven cars to help navigation.