单项选择题
A.20-40m3/hB.20-50m3/hC.30-40m3/hD.30-50m3/h
A.2.5mB.2.0mC.1.6mD.1.2m
A.100~150m3/hB.120~170m3/hC.125~175m3/hD.150~200m3/h