A.≥3级 B.≥2级 C.≥5级 D.≥4级
A.GB/T21660-2008 B.GB/T21661-2008 C.GB/T21662-2008 D.GB/T21663-2008
A.油画棒 B.涂改液 C.胶粘剂 D.记号笔
A.室温 B.40℃ C.45℃ D.50℃
A.0.2% B.0.3% C.0.4% D.0.5%
A.3mm B.4mm C.5mm D.6mm
A.0.05mm B.0.08mm C.0.2mm D.0.3mm
A.白 B.黑 C.黄 D.红
A.4 B.5 C.6 D.7
A.5 B.8 C.10 D.15
