单项选择题
A.70℃,恒温1.5h,100℃,4h B.70℃,恒温1.5h,100℃,恒温1h;自然冷却 C.70℃,24h D.100℃,24h E.70℃,恒温12h
A.5Ω B.4Ω C.3Ω D.2Ω E.1Ω
A.1.3~1.4MPa B.1.1~1.2MPa C.0.9~1.0MPa D.0.6~0.8MPa E.0.3~0.5MPa