题干
--- Journalists have to work very quickly in order to_______.
--- I know. I like that. It’s very challenging.
--- I know. I like that. It’s very challenging.
A：meet their deadline
B：earn a high salary
C：avoid being fired
D：make both ends meet
答案(点此获取答案解析）
A
是
上的偶函数，且
，如果
在
上是减
和
上分别是 （ ）