财政政策协调功能的主要特征不包括( )。
A．多维性B．动态性C．导向性D．适度性
参考答案：C
I often see Barbara _____ after school. [ ]
A. play the flute
B. play flute
C. playing the flute
D. playing flute
联合杠杆系数是（）与（）的乘积。
