单项选择题
A.1~2ml B.3~5ml C.5~7ml D.8~12ml E.15~20ml
A.0~2cm B.2~4cm C.4~6cm D.6~8cm E.8~10cm
A.0.5cm以下 B.0.5~1cm C.1~1.5cm D.1.5~2.0cm E.2.0~2.5cm
A.12~24h B.48~72h C.4~5d D.6~7d E.8~10d
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