题干
I like Happy Forward (《快乐向前冲》)very much because it's very i____.
答案(点此获取答案解析）
interesting
I like Happy Forward (《快乐向前冲》)very much because it's very i____.
的焦点F作一直线交抛物线于P，Q两点，若线段PF与FQ的长分别是
，则
=（ ）
