下列除哪项外 ,均可见到周围血管征
Which of the following activities is suitable to be conducted at the “production” step?
下列各项,不符合慢性阻塞性肺疾病严重程度分级中的Ⅱ级(中度)的是
/FVC<70%
<80%预计值
≥80%预计值