单项选择题

The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.

A.475 RPM
B.950 RPM
C.1900 RPM
D.2400 RPM

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船舶动力装置

The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.