单项选择题
A.10kW/tB.15kW/tC.20kW/tD.25kW/t
A.3-4mmB.7-10mmC.10-14mmD.14-20mm
A.0.6B.0.7C.0.8D.0.9
A.2300mB.3300mC.4300mD.5300m
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