单项选择题
A.3±1mm B.4±1mm C.3±2mm D.4±2mm
A.0.5mm B.0.1mm C.1.0mm D.0.2mm
A.2 B.3 C.4 D.5
A.10cm B.15cm C.20cm D.25cm
A.5cm B.10cm C.15cm D.20cm
A.5.0mm B.2.5mm C.4.75mm D.2.36mm
A.20±1℃ B.20±2℃ C.20±3℃ D.20±5℃
A.10% B.15% C.20% D.25%
A.1:3,1.0 B.1:4,0.5 C.1:3,0.5 D.1:4,1.0
A.50N/s±10N/s B.100N/s±10N/s C.2500N/s±200N/s D.2400N/s±200N/s
A.5mm B.10mm C.15mm D.20mm