A.25mm³4mm~40mm³4mm B.20mm³4mm~40mm³4mm C.15mm³4mm~40mm³4mm D.10mm³4mm~40mm³4mm
A.12mm×4mm B.16mm×4mm C.18mm×4mm D.20mm×4mm
A.A B.B C.C D.D
A.变得很大 B.变得很小 C.略有上升 D.略有下降
A.20 B.50 C.100 D.150