Corrosion and grooving on the blade of an exhaust driven turbocharger is caused by certain components of residual fuel oilsThese components are vanadium,sodium, and（）<br>A:copper<br>B:carbon<br>C:hydrogen<br>D:sulfur

Corrosion and grooving on the blade of an exhaust driven turbocharger is caused by certain components of residual fuel oilsThese components are vanadium,sodium, and（）
A:copper
B:carbon
C:hydrogen
D:sulfur

出自：海船船员证

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