单项选择题
A.六防一零一可 B.高分子游艇通用板材 C.潮流不潮湿 D.懂美,更懂你
A.GB/6566 B.GB/T6952 C.GB18145 D.GB6952
A.6mm B.8mm C.6mm 8mm 10mm D.12mm