An integer c is a mon divisor of two integers x and y if and only if c is a divisor of x and c is a divisor of y.Which of the following sets of integers could possibly be the set of all mon divi
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首先不能有0,去掉答案B和D.根据题目给出的答案选项看,如果6是正确的,则分解为±1,2,3,6.A少3,E多4.