表层皮片的厚度约为 A．0.1～0.15mm B．0.2～0.25mm C

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问题表层皮片的厚度约为A．0.1～0.15mmB．0.2～0.25mmC．0.3～0.35mmD．0.35～0.4mmE．0.45～0.5mm

选项

答案B

解析

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