单项选择题
A.341℃ B.551℃ C.651℃ D.762℃
A.2%~9% B.9%~15.7% C.15.7%~20.6% D.15.7%~27.4%
A.-35~-40℃ B.-25~-20℃ C.-15~-10℃ D.-10~-4℃
A.0.2~0.4MPa B.0.3~0.5MPa C.0.5~0.7MPa D.0.6~0.8MPa
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