单项选择题
A.10mmB.9mmC.8mmD.7mm
A.53.5B.46.5C.54D.46
A.0.91,0.91B.0.91,1.18C.1.18,0.91D.1.18,1.18
A.0.1B.0.1MPaC.0.01D.0.01MPa
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