单项选择题
A.±0.005g/cm3 B.±0.02g/cm3 C.±0.01g/cm3 D.±0.015g/cm3
A.1.30g/cm3 B.1.32g/cm3 C.1.35g/cm3 D.1.40g/cm3
A.米、瓦特 B.米、斤 C.秒、斤 D.牛顿、升