单项选择题
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
A.6.46B.12.46C.13.91D.17.14
A.40.48B.56.98C.59.30D.65.23
A.78.9%B.66.7%C.60.0%D.37.5%
A.3.6B.4.2C.8.4D.16.8
A.10.9B.13.2C.20.5D.24.0