实际利率理论认为，投资是利率的（）函数。
参考答案：递减
Lucy is very excited today because it is her _____ birthday.[ ]
A. fourteenth
B. the fourteenth
C. fourteen
D. the fourteenth
较为稳定的股骨颈骨折是
A．外展型
B．内收型
C．粗隆间型
D．头下型
E．颈基底型
