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In comparison to exhaust valves, intake valves of diesel engines may be fabricated from low alloy steels because （）.
A:the beveled edges of the intake valves provide for serf-centering during seating
B:intake valves utilize stellite-coated valve seat inserts which reduce wear
C:the volume of air passing through intake valves is less than the volume of air passing through exhaust valves
D:intake valves are less affected to the corrosive action of exhaust gases

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出自：海船船员证

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