8. 小明覺得人生很難,用力的嘆了一口氣。請問用力吐氣 (expiratory)時,下列肌肉所執行動作何者錯誤? (A)腹橫肌 (transverse abdominis) 向心收縮 (concentric contraction) (B)外肋間肌 (external intercostal muscles) 向心收縮(concentric contraction) (C)內肋間肌 (internal intercostal muscles) 向心收縮 (concentric contraction) (D)橫隔膜 (diaphragm) 離心收縮(eccentric contraction)