31.慢性呼吸衰竭急性惡化(acute on chronic respirtory failure)如慢性阻塞性肺疾病合併呼吸衰竭,下列那些現像常會出現,導致這類病人呼吸肌肉無力(muscleweakness)何者除外? (A) Hypokalemia (B) Hyperphosphatemia (C) Corticosteroid-elated myopathy (D) Oxidant-related respiratory muscle injury