Gaokao Math Practice Question
2. 设复数 $z$ 满足 $|z-\mathrm{i}|=1, z$ 在复平面内对应的点为 $(x, y)$, 则
- A.$(x+1)^{2}+y^{2}=1$
- B.$(x-1)^{2}+y^{2}=1$
- C.$x^{2}+(y-1)^{2}=1$
- D.$x^{2}+(y+1)^{2}=1$
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