问题
单项选择题
当汽车发动机气缸磨损超过规定极限后，燃油与润滑油消耗量大增，这是（）的表现。
A.经济性变坏
B.动力性下降
C.可靠性变坏
D.技术性变坏
答案
参考答案：A
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当汽车发动机气缸磨损超过规定极限后，燃油与润滑油消耗量大增，这是（）的表现。
A.经济性变坏
B.动力性下降
C.可靠性变坏
D.技术性变坏
参考答案：A
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