单项选择题
A.50.5mmB.63.5mmC.89.9mmD.0.5mm
A.0.75mmB.0.85mmC.0.65mmD.0.56mm
A.371℃B.435℃C.445℃D.495℃
A.0.2%B.0.5%C.90%D.99.9%
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