30.下列何者不是混合性（mixed）肺功能異常的表現？ (A)肺活量（vital capacity, VC）大於預測值的80%，且尖峰吸氣流速（peak inspiratory flow rate, PIFR）小於預測值的80% (B)尖峰呼氣流速（peak expiratory flow rate, PEFR）小於預測值的80% (C)總肺量（total lung capacity, TLC）小於預測值的80% (D)同時併有阻塞性和侷限性肺功能異常