题干
Maria likes music very much. She thinks it is very ____ (interest).
答案(点此获取答案解析）
interesting
Maria likes music very much. She thinks it is very ____ (interest).
（单位：万元）与年产量
（单位：万件）的函数关系式为
，则使该生产厂家获得最大年利润的年产量为