战术就是实现战略目的的手段，在战场上指挥军队的方针和策略。战略，被认为是为了达到战争和军事作战的目的，高瞻远瞩地执行战争计划，大规模运用军事力量的方针和策略。
I have an abstract class named Xpto and two subclasses that extend it named Person and Car. I have also a class named Test with main() and a method foo() that verifies if two persons or cars (or any o
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