天津市河西区2014
高考英语阅读理解5.1假天天练（2）及答案 global positioning systems（全球定位系统） are now a part of everyday driving in many countries. these satellite-based systems provide turn-by-turn directions to help people get to where they want to go. however, they can also cause a lot of problems, send you to the wrong place or leave you completely lost. many times, the driver is to blame. sometimes a gps error is responsible. most often, says b
