有關慢性阻塞性肺病（chronic obstructive pulmonary disease）的肺功能測試結果，下列敘述何者錯誤？①全肺量（total lung capacity, TLC）降低 ②功能肺餘量（functional residual capacity, FRC）增加 ③肺活量（vital capacity, VC） 增加 ④第一秒用力吐氣容積（forced expiratory volume in 1 second, FEV1）降低 ⑤第一秒用力吐氣容積與肺活量比率（FEV1/VC）降低 ⑥吐氣中期氣流速度（forced expiratory flow from 25% to 75%）降低