单项选择题
A.+2.25DSB.+3.50DSC.+1.00DSD.+3.00DS
A.+1.75DSB.+0.25DSC.+3.25DSD.+2.25DS
A.+1.50DSB.+1.25DSC.+1.75DSD.+1.00DS
A.-4.25DSB.-3.25DSC.-2.25DSD.+1.00DS
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