单项选择题
A.髂骨 B.颈椎 C.下肢骨 D.肋骨 E.胸骨
A.6～8周 B.2～4周 C.1～2周 D.8～10周 E.立即行手术
A.0.15ng/ml B.0.1ng/ml C.2ng/ml D.4ng/ml E.1ng/ml
A.＞0.15ng/ml B.＞0.1ng/ml C.＞0.25ng/ml D.＞0.2ng/ml E.＞2ng/ml
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