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