单项选择题
A.0.4m/s B.0.5m/s C.0.65m/s D.0.75m/s
A.圆形喷洒 B.椭圆形喷洒 C.扇形喷洒 D.方形喷洒
A.0.1kPa B.1kPa C.10kPa D.100kPa
A.kg/m2 B.kg/m3 C.g/L D.g/mL
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