单项选择题
A.0.50B.0.55C.0.70D.1.00
A.1864B.1951C.1960D.2156
A.0.55B.1.00C.1.56D.1.81
A.6600B.7850C.8725D.8750
A.4.89B.5.54C.13.19D.13.84
A.DNI00B.DN125C.DN150D.DN200
A.5.70B.6.78C.6.90D.7.98
A.275142B.305344C.550284D.1100568
A.6.0B.5.5C.5.0D.4.5
A.117.44B.113.50C.113.07D.86.67
A.63B.62C.61.2D.59