单项选择题
A.300~400mgKOH/gB.201~211mgKOH/gC.130~160mgKOH/gD.111~130mgKOH/g
A.90.5%B.92.2%C.94.0%D.96.4%
A.SBR-1778B.SBR-1712C.SBR-1502D.SBR-1500