Gaokao Math Practice Question
2. 设 $z=\mathrm{i}(2+\mathrm{i})$ ，则 $\bar{z}=$
- A.$1+2 \mathrm{i}$
- B.$-1+2 \mathrm{i}$
- C.$1-2 \mathrm{i}$
- D.$-1-2 \mathrm{i}$
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