题干
— Remember to pick up your little sister on your way home.
— _______. You can depend on me.
— _______. You can depend on me.
A：Don’t mention it.
B：No way
C：Got it
D：My pleasure.
答案(点此获取答案解析）
C
对任意自然数x，y均满足：
，且
，则
等于（ ）
