单项选择题
A.0.2MpaB.0.3Mpa C.0.4Mpa D.0.5Mpa
A.15.5Mpa B.16.2Mpa C.16.5Mpa D.17.2Mpa
A.0.1Mpa B.0.2Mpa C.0.3Mpa D.0.4Mpa