33. 记max{p,q}={p,p⩾q,q,q>p,max\{p,q\}=\left\{{\left.\begin{array}{l}{p,p\geqslant q,}\\ {q,q>p,}\end{array}\right.}\right.max{p,q}={p,p⩾q,q,q>p,设函数f(x)=max{ex−2−1,−x2+mx−12}f(x)=max\left\{{{e^{x-2}}-1,-{x^2}+mx-\frac{1}{2}}\right\}f(x)=max{ex−2−1,−x2+mx−21}，若函数f(x)f(x)f(x)恰有三个零点，则实数mmm的取值范围的是((( )))