单项选择题
A.因子Ⅰ B.因子Ⅴ C.因子Ⅶ D.因子Ⅸ E.因子XⅢ
A.31~43s B.50s C.<75s D.与正常对照相当 E.正常对照的1.5~3倍
A.0.2 B.0.4 C.0.5 D.0.6 E.0.8
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