1. The sum of all roots of the equation $|2 x-4|=5$ is ( ).
(A) -0.5
(B) 4.5
(C) 5
(D) 4
- 1. D.
$$
\begin{array}{l}
\text { Given }|2 x-4|=5 \Rightarrow 2 x-4= \pm 5 \\
\Rightarrow x_{1}=4.5, x_{2}=-0.5 \\
\Rightarrow x_{1}+x_{2}=4.5-0.5=4 .
\end{array}
$$