题目

David has won the first prize in singing; he is still very excited now and feels________ desire to go to bed. A. the most           B. more          C. worse          D. the least 答案：D已知椭圆与抛物线共焦点，抛物线上的点M到y轴的距离等于，且椭圆与抛物线的交点Q满足．（I）求抛物线的方程和椭圆的方程；（II）过抛物线上的点作抛物线的切线交椭圆于、 两点，求此切线在x轴上的截距的取值范围．