单项选择题
A.0.8000—0.8500g/cm3 B.0.7000—0.7500g/cm3 C.0.8500—0.9000g/cm3 D.以上三种都是
A.1 B.0.1 C.10 D.1000
A.量油尺 B.密度计 C.温度计 D.采样桶