阅读下面这首古诗，完成后面小题。
                                                                                                         冷香菊
                                                                                                         陈荣卿
                                                                                       晚秋风紧晓霜寒，香阵飘飘透竹帘。
                                                                                       荒径幽林甘冷落，肯于人世学趋炎？

已知函数$f\left(x\right)=\left\{\begin{array}{c}{2}^x,x<1\\ f\left(x-1\right),x\ge 1\end{array}\right.$,则$f\left({\log }_{2}7\right)=$(      )

下列各句中，没有语病的一句是（    ）

在│-2│，-│0│，（-2）⁵，-│-2│，-（-2）这5个数中负数共有 (     )