题目

There_________ a new film this afternoon.A．is going to haveB．is going to beC．will haveD．has 答案：B解析:略已知F1、F2为椭圆+=1的两个焦点，过F1的直线交椭圆于A、B两点．若|F2A|+|F2B|=12，则|AB|=    ．