单选题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。AⅠ＋Ⅱ＋ⅤBⅠ＋ⅤCⅡ＋ⅤDⅠ＋Ⅲ＋Ⅴ
单选题
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
参考解析
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