过抛物线y=4x的焦点,作直线与此抛物线相交于两点P和Q,那么线段PQ中点的轨迹方程()A、y=2x-1B、y=2x-2C、y=-2x+1D、-2x+2
过抛物线y=4x的焦点,作直线与此抛物线相交于两点P和Q,那么线段PQ中点的轨迹方程()
- A、y=2x-1
- B、y=2x-2
- C、y=-2x+1
- D、-2x+2
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