A.5% B.10% C.15% D.20%
A.40℃B.60℃C.80℃D.100℃
A.7 B.10 C.14 D.21
A.0.1~0.2Mpa B.0.2~0.4Mpa C.0.5~0.6MPa D.0.7~0.9MPa