單項(xiàng)選擇題
A.30~50m B.50~100m C.100~150m D.150~200m
A.50mmB.100mmC.200mmD.250mm
A.50mm B.100mm C.200mm D.250mm
A.±500mm B.±600mm C.±700mm D.±800mm
A.3m B.6m C.7m D.8m
A.5m B.6m C.7m D.8m
A.0.3mB.0.5mC.0.6mD.0.8m
A.0.2m B.0.25m C.0.3m D.0.35m
A.0.3m B.0.5m C.0.6m D.0.8m
A.50% B.60% C.70% D.80%
A.2Ω和8Ω B.4Ω和6Ω C.3Ω和7Ω D.5Ω和5Ω