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单项选择题
A.60min
B.45min
C.30min
D.90min
单项选择题
A.2.5KPa
B.2.0KPa
C.1.5KPa
D.1.0KPa
单项选择题
A.0.001mg
B.1mg
C.0.01mg
D.0.1mg
单项选择题
A.3个月
B.6个月
C.9个月
D.12个月
单项选择题
A.0.0363W/(mm·K)
B.0.0329W/(mm·K)
C.0.0328W/(mm·K)
D.0.0361W/(mm·K)
单项选择题
A.5
B.6
C.8
D.9
单项选择题
A.24h
B.16h
C.20h
D.12h
单项选择题
A.1级,0.001mm
B.0.5级,0.001mm
C.1级,0.01mm
D.0.5级,0.01mm
单项选择题
A.60±10%
B.60±5%
C.50±10%
D.50±5%