单选题The speed of the camshaft in a two-stroke/cycle diesel engine, running at 950 RPM, is （）.A475 RPMB950 RPMC1900 RPMD2400 RPM
单选题
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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