单项选择题
A.-5.75DSB.-5.50DSC.-6.00DSD.+1.75DS
A.+5.25DSB.-5.25DSC.+1.50DSD.-2.25DS
A.+1.25DSB.+1.50DSC.-1.00DSD.-0.50DS
A.+2.25DSB.+3.50DSC.+1.00DSD.+3.00DS
微信扫一扫,加关注免费搜题