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Gaokao Math Practice Question

5. (5 分) 已知椭圆 $E$ 的中心在坐标原点, 离心率为 $\frac{1}{2}, E$ 的右焦点与抛物线 $C$ : $y^{2}=8 x$ 的焦点重合, $A, B$ 是 $C$ 的准线与 $E$ 的两个交点, 则 $|A B|=(\quad)$

  1. A.3
  2. B.6
  3. C.9
  4. D.12

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