单项选择题
A.42006 B.42007 C.42038 D.42008
A.100mm、300mm B.300mm、100mm C.150mm、200mm D.200mm、200mm
A.75mm 140mm B.80mm 150mm C.80mm 140mm D.90mm 150mm
A.1mm B.2mm C.3mm D.4mm
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