单项选择题
A.0.87B.0.83C.0.82D.0.77
A.100mm±2mmB.60mm±2mmC.50mm±2mmD.90mm±2mm
A.30min,3B.30min,6C.15min,6D.15min,3
A.0.20W/(m·K)B.0.18W/(m·K)C.0.085W/(m·K)D.0.070W/(m·K)
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