A.60cm B.50cm C.20cm D.25cm
A.10mm B.50mm C.20mm D.25mm
A.150℃ B.240℃ C.280℃ D.320℃
A.1∶200 B.1∶500 C.1∶1000 D.1∶2000
A.20cm B.15cm C.10cm D.7cm