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                                                                                                                     一 鹭 图
                                                                                                                     刘羽（明）
                                                                                                芳草垂杨荫碧流，雪衣公子立芳洲。
                                                                                                一生清意无人识，独向斜阳叹白头。

下列有关T₂噬菌体侵染细菌实验过程的说法中正确的是（　　）

“-3<m<-1”是方程$\frac{x^2}{2+m}+\frac{y^2}{m+1}=1$表示双曲线的（    ）