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Gaokao Math Practice Question

1. (5 分) 已知 $z=(m+3)+(m-1) i$ 在复平面内对应的点在第四象限, 则实 数 $m$ 的取值范围是 $(\quad)$

  1. A.$(-3,1)$
  2. B.$(-1,3)$
  3. C.$(1,+\infty)$
  4. D.$(-\infty,-3)$

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