让患者做打哈欠动作，其目的是()
A．克服鼻音化
B．音量训练
C．克服气息音
D．克服费力音
E．语调训练
参考答案：D
According to the modem view of the Phillips curve, the actual inflation is 6% , while the expected inflation 5% , the most likely initial effect is that:（）
A. the natural rate of unemployment will fall.
B. the natural rate of unemployment will rise.
C. unemployment will fall below its natural rate.
未成年人的犯罪行为较之成年人具有（）、（）、（）反复性等特点。
