Gaokao Math Practice Question
1. （5 分) 已知集合 $A=\{-2,0,2\}, B=\left\{x \mid x^{2}-x-2=0\right\}$, 则 $A \cap B=(\quad)$
- A.$\varnothing$
- B.$\{2\}$
- C.$\{0\}$
- D.$\{-2\}$
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