set1={1,2,3}set2={2,3,4}set1和set2的并集是?

7 查阅

set1={1,2,3}set2={2,3,4}set1和set2的并集是?

A.{1,2,3}

B.{2,3,4}

C.{1,2,3,4}

D.{2,3}

参考答案:

答案:C