同一问题从不同的角度入手,可以得到相同的结果,如同打一场战争,可以“正面进攻”,也可以采用“围点打援”、“迂回”、“包抄”等策略,机动、灵活地运用不同的方法而达到最终的目的.题目(2001年春季高考题)一物体放置在倾角为θ的斜面上,斜面固定于加速上升的电梯中,加速度为a,如图1所示.在物体始终 Starting from different perspectives, the same problem can achieve the same result. Just as you can fight a war, you can use it as a “frontal offense,” or you can use strategies such as “encircling and fighting for help”, “circumference”, and “outsourcing” to use it flexibly and flexibly. Different methods to achieve the final goal. Title (Spring 2001 entrance exam questions) An object is placed on an inclined plane with an inclination of θ. The inclined surface is fixed in an accelerating elevator and the acceleration is a, as shown in Fig. 1. The object is always