题干
据所听到的内容选择正确答语（ ）
A：He can't find his notebook.
B：He doesn't finish homework.
C：He argued with his friend.
答案(点此获取答案解析）
A
，则
（ ）
和曲线
有两个不同的交点，则实数ｍ的取值范围是