(2)已知 $\mathrm{U}=\mathrm{R}, \mathrm{A}=\{x \mid x>0\}, \mathrm{B}=\{x \mid x \leq-1\}$ ,则 $\left(\mathrm{A}\left(A \cap C_{u} B\right) \cup\left(B \cap C_{u} A\right)=\right.$
参考答案D
2008_浙江卷 (2008·理)
(2)已知 $\mathrm{U}=\mathrm{R}, \mathrm{A}=\{x \mid x>0\}, \mathrm{B}=\{x \mid x \leq-1\}$ ,则 $\left(\mathrm{A}\left(A \cap C_{u} B\right) \cup\left(B \cap C_{u} A\right)=\right.$