单项选择题
A.1.22m B.1.52m C.1.25m D.1.20m
A.①④③② B.②①④③ C.④③②① D.①③④③
A.0.25~0.7Mpa B.0.25~0.8Mpa C.0.35~0.7Mpa D.0.35~0.8Mpa