Gaokao Math Practice Question
1.已知集合 $A=\left\{(x, y) \mid x, y \in \mathbf{N}^{*}, y \geq x\right\}, B=\{(x, y) \mid x+y=8\}$, 则 $A \cap B$ 中元素的个数为 $(\quad)$
- A.2
- B.3
- C.4
- D.6
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