单项选择题
A.≥102cfu/ml B.≥103cfu/ml C.≥104cfu/ml D.≥105cfu/ml E.≥106cfu/ml
A.5% B.10% C.15% D.20% E.25%
A.从指尖到腕上10cm B.从指尖到腕上20cm C.从指尖到肘部 D.从指尖到肘上10cm E.从指尖到肘上20cm