单项选择题
A.0.65~3B.0.6~3.2C.0.65~3.2D.0.6~3.0
A.70~80B.60~70C.55~65D.50~60
A.80~90B.70~80C.60~70D.60~80
A.80~200B.80~180C.<200D.<80
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