A:{3}
B:{0,3}
C:{1,2}
D:{0,1}
— It's dangerous to swim here. Look at the sign.
— Oh, I notice it. Thanks for telling me.
车载GPS 导航仪是通过与导航卫星互相传递信息,确定汽车的准确位置,并在电子地图上显示出来(如图),为汽车驾驶员导航。下列说法正确的是:()