2. （5 分）已知集合 $A=\{1,3,5,7\}, B=\{2,3,4,5\}$, 则 $A \cap B=(\quad)$
Gaokao · Math · previous-year question
- A.$\{3\}$
- B.$\{5\}$
- C.$\{3,5\}$
- D.$\{1,2,3,4,5,7\}$
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