38.
If r and s are positive integers, is r/s an integer?
(1) Every factor of s is also a factor of r.
(2) Every prime factor of s is also a prime factor of r.
请问这题要怎么理解呢?? 求教~谢谢!!
原来是看错题目了
个人认为这两个条件完全没用处,选E
(1)s=6,r=12,s有factor2&3&6,12也有
(2)距离同上
sorry, 看错题目了,这样就能理解了,答案是(A), 谢谢!!
轮到我不理解了,为什么是A啊?
刚刚才发现是is的题,那样的话也要选D不是吗?
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