单选题Which of the following statements concerning cylinder liner wear is true?（）ALiner wear is distributed equally between the upper and lower portions of the cylinderBExcessive liner wear causes wear between piston ring and grooveCExcessive, but uniform liner wear will not cause wear between piston ring and grooveDLiner wear is normally greatest in the middle of the cylinder
单选题
Which of the following statements concerning cylinder liner wear is true?（）
A
Liner wear is distributed equally between the upper and lower portions of the cylinder
B
Excessive liner wear causes wear between piston ring and groove
C
Excessive, but uniform liner wear will not cause wear between piston ring and groove
D
Liner wear is normally greatest in the middle of the cylinder
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