set1={1,2,3}set2={2,3,4}set1和set2的差集是?

5 查阅

set1={1,2,3}set2={2,3,4}set1和set2的差集是?

A.{1}

B.{1,}

C.{1,2,3,4}

D.{1,2,3}

参考答案:

答案:A