单项选择题
A.0.1MPa B.0.2MPa C.0.25MPa D.0.08MPa
A.70% B.0% C.30% D.任意开度
A.≯0.1,0.05-0.15 B.≯0.1,≯0.1 C.0.05-0.15,0.05-0.15 D.0.05-0.15,≯0.1
A.0.1 B.0.2 C.0.3 D.0.4
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