【填空题】
A、吸入支气管扩张剂后,FEV1/FVC<70%,FEV1≥80% B、吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1<80% C、吸入支气管扩张剂后,FEV1/FVC<70%,30%≤FEV1<50% D、吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%,或FEV1<50%且伴有慢性呼吸衰竭
A、轻度为吸入支气管扩张剂后,FEV1/FVC<70%,FEV1≥80% B、中度为吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1≤80% C、重度为吸入支气管扩张剂后,FEV1/FVC<70%,50%≤FEV1<80% D、极重度为吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%,伴有慢性呼吸衰竭
A、吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30% B、吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<50% C、吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<30%且伴慢性呼吸衰竭 D、吸入支气管扩张剂后,FEV1/FVC<70%,FEV1<50%且伴慢性呼吸衰竭