题目

This is a story that can teach us a good lesson. One day, a man in rags begged from door to door along the street. With an old wallet in his hand, he was asking for a few coins to buy something to eat. He kept complaining about his bad fortune and kept __36__ why those who had so much money were never __37__ and were always desiring more. “As far as I'm concerned, if I had only enough to ___38__ and to wear, I would not want anything more.” Just at that moment Goddess Fortune, who came down the __39__ saw the beggar and said to him, “Hi, I have wished to __40__ you for a long tim下列关于力的合成和分解的说法,正确的是 (    ) A.两个力的合力,可能比这两个分力都小 B.已知合力及一个分力的大小和方向,则求另一个分力有唯一解 C.3N、4N、6N三个共点力最大合力为13N,最小合力为0N D.静止在斜面上的物体的重力,可以分解为一个使物体沿斜面下滑的力,另一个是物体对斜面的压力
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