单项选择题
A.0.2MpaB.0.15MpaC.0.25MpaD.0.10Mpa
A.0.35—0.45MpaB.0.40—0.45MpaC.0.35—0.40MpaD.0.30—0.45Mpa
A.1mB.1.5mC.70cmD.1.2m