菲利普斯曲线描述的是一条( )。

A．失业与就业之间关系的曲线
B．工资与就业之间关系的曲线
C．工资与利润之间关系的曲线
D．失业与通货膨胀之间交替关系的曲线

---According to my grandma, it is a good idea to eat chicken soup when you have a cold.

---_________,scientists agree with her.

A．Sooner or later

B．Once in a while

C．To be exact

D．Believe it or not