单项选择题
A.80% B.85% C.90% D.100%
A.3 B.5 C.10 D.15
A.0.1 B.0.2 C.0.3 D.0.4
A.0.02MPa B.0.03MPa C.0.04MPa D.0.05MPa
A.0.3Mpa B.0.4Mpa C.0.5MPa D.0.6MPa
A.3 B.4 C.5 D.6