GPS 在物流领域可以应用于汽车自定位、跟踪调度用于铁路运输管理、用于军事物流。
A. 对
B. 错
北斗卫星导航系统（CNSS），是除美国的全球定位系统（GPS）、俄罗斯的GLONASS之后第三个成熟的卫星导航系统。
A. 对
B. 错
Welding______________________.
A. It is fixing the base and the sides together
B. It is basic.
C. It is where we do it.
Measuring vehicles _________________.
A. This is done here and there.
B. This is done with a ruler.
C. This is done with laser equipment.
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