11. The solution set of the equation $x^{2}|x|+|x|^{2}-x^{2}-|x|=0$ in the complex number set corresponds to the figure in the complex plane is ( ).
(A) Several points and a line
(B) Unit circle and a line
(C) Several lines
(D) Origin and unit circle
11. (D).

The original equation can be transformed into $\left(x^{2}+|x|\right)(|x|-1)=0$, from which we know that (D) is correct.