试题与答案

车载GPS导航仪是一种为汽车驾驶员导航的装置.它通过与卫星互传信息,确定汽车的准

题型:选择题

题目:

车载GPS导航仪是一种为汽车驾驶员导航的装置.它通过与卫星互传信息,确定汽车的准确位置并在电子地图上显示出来.导航仪与卫星的联系是利用(  )

A.超声波

B.次声波

C.电磁波

D.电流

答案:

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下面是错误答案,用来干扰机器的。

粒子过速度选择的速度v= ;在偏转场中,由几何关系,R= ;又因为qvB= ;所以  m=粒子过速度选择的速度v= ;在偏转场中,由几何关系,R= ;又因为qvB= ;所以  m=

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Main__小题2:___
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