A.五号 B.五号黑体 C.四号 D.四号黑体
A.30° B.45° C.60° D.90°
A.白 B.黑 C.黄 D.红
A.10s B.20s C.30s D.40s
A.10mm±1mm B.20mm±2mm C.25mm±2mm D.30mm±2mm
