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單項(xiàng)選擇題

當(dāng)呼吸功能出現(xiàn)MVV%為45%～59%，RV/TLC為51%～65%。FEV1為40%～54%時(shí)，呼吸功能為()

A．正常
B．輕度損害
C．中度損害
D．重度損害
E．極重度損害

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