单项选择题
A.0.1~1.2ng/mlB.0.6~2.4ng/mlC.1.0~2.4ng/mlD.2.0~10ng/ml
A.30~300ng/mlB.100~200ng/mlC.200~500ng/mlD.500~700ng/ml
A.20-65B.30-120C.30-65
A.20-150B.10-150C.30-120
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