问题描述：
[单选]
The withdrawing of the cylinder liners， in general， depends on their（）．This may amount to approximately 1/120 of the diameter in some engines．
A．correct maneuvering
B．wear
C．working efficiency
D．maintenance
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下一篇：The way to reduce（）is to build up a film of lubricant between any two surfaces that rub against each other．
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