Gaokao Math Practice Question
1. 若 $z=-1+\sqrt{3} \mathbf{i}$, 则 $\frac{z}{z \bar{z}-1}=()$
- A.$-1+\sqrt{3} \mathrm{i}$
- B.$-1-\sqrt{3} i$
- C.$-\frac{1}{3}+\frac{\sqrt{3}}{3} \mathrm{i}$
- D.$-\frac{1}{3}-\frac{\sqrt{3}}{3} i$
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