韶山。型电力机车传动齿轮齿形偏差()时禁用。
A.≥0.1mm
B.≥0.2mm
C.≥0.3mm
D.≥0.35mm
参考答案:D
I could just see a car in the distance, but I couldn’t _____ what color it was.
A.look out
B.get across
C.make out
D.take after
功率因素的计算公式为()。
A、P/Q
B、Q/S
C、P/S
D、Q/P