单项选择题
A.搞清油气性质 B.搞清产能情况 C.求得流动压力 D.清洗井筒
A.1psi=6.89×10-3MPa B.1MPa=6.89×10-3psi C.1MPa=10kPa D.1at=10MPa
A.0.7~0.73 B.0.8~0.84 C.0.6~0.73 D.1