A.0.54MPa B.0.69MPa C.0.49MPa D.0.44M

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问题 A.0.54MPaB.0.69MPaC.0.49MPaD.0.44MPa

选项 A.0.54MPa
B.0.69MPa
C.0.49MPa
D.0.44MPa

答案 B

解析
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