单项选择题
A.58D B.65D C.70D D.75D E.80D
A.不变 B.减少-2.50～-3.00D C.增加-2.50～-3.00D D.减少-1.50～-2.00D E.增加-1.50～-2.00D
A.+2.00～+3.00D B.+3.00～+4.00D C.+4.00～+5.00D D.+1.00～+2.00D E.0～+1.00D
A.20D B.23D C.17D D.8D E.5D
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