单项选择题
A.58DB.65DC.70DD.75DE.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