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例1在以速度v1向东行驶的甲车上的乘客看来，乙车向西行驶；在以速度v2向西行驶的丙车上的乘客看来，乙车向东行驶，则动车相对于地面的运动状况可能是（）A以小于v1的速度向东行驶B.以小于v2的速度向西行驶C．以大于v1的速度向东行驶D．静止不动［1995年《第二届全国奥林匹克
Example 1 From the perspective of a passenger on a car travelling eastward at speed v1, the westbound car is on the west; in the case of a passenger on a van moving westward at a speed of v2, the second car is travelling eastward. The ground conditions may be () A travels east at speeds less than v1 B. travels westward at speeds less than v2. Travel eastward at a speed greater than v1. Immobile [1995 Second National Olympics