單項(xiàng)選擇題
A.等于或小于 B.小于 C.大于 D.等于或大于
A.70ms B.80ms C.90ms D.100ms
A.100ms B.300ms C.400ms D.500ms
A.2mm B.3mm C.4mm D.5mm
A.10km/h B.15km/h C.20km/h D.25km/h
A.±3t B.±4t C.±5t D.±6t
A.變化 B.變化的時(shí)間 C.變化的趨向 D.變化率
A.2V B.5V C.10V D.15V
A.0.5% B.1% C.2% D.2.5%
A.20W B.25W C.30W D.35W
A.90° B.100° C.180° D.450°