Gaokao Math Practice Question
下面是关于复数 $z=\frac{2}{-1+i}$ 的四个命题: 其中的真命题为 （$\qquad $）, $\mathrm{p}_{1}:|\mathrm{z}|=2$, $p_{2}: z^{2}=2 \mathrm{i}$, $p_{3}: z$ 的共轭复数为 $1+i$, $p_{4}: \mathrm{z}$ 的虚部为 -1 .
- A.$\mathrm{p}_{2}, \mathrm{p}_{3}$
- B.$p_{1}, p_{2}$
- C.$\mathrm{p}_{2}, \mathrm{p}_{4}$
- D.$p_{3}, p_{4}$
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