Gaokao Math Practice Question
1. 已知集合 $U=\{-2,-1,0,1,2,3\}, A=\{-1,0,1\}, B=\{1,2\}$, 则 $\oint_{U}(A \cup B)=()$
- A.$\{-2,3\}$
- B.$\{-2,2,3\}$
- C.$\{-2,-1,0,3\}$
- D.$\{-2,-1,0,2,3\}$
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