单项选择题
A.10% B.20% C.40% D.80%
A.56% B.65% C.67% D.76%
A.血清孕酮;HCG B.HCG;雌二醇 C.雌二醇;血清孕酮 D.HCG;血清孕酮
A.50% B.51% C.52% D.53%
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