活塞销的主要损坏形式是_______ I. 磨损 II. 摩擦 III. 擦伤 IV. 腐蚀 V.
活塞销的主要损坏形式是_______ I. 磨损,II. 摩擦,III. 擦伤,IV. 腐蚀,V. 裂纹
A.I+II+V
B.I+V
C.II+V
D.I+III+V
请帮忙给出正确答案和分析,谢谢!
参考解答
正确答案:B
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