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【多选题】
为什么对环境有害的窜缸混合气同样也会对发动机造成损害?指出两个原因。A.
导致排放口的堵塞，结果降低了排放效率。
B.
与发动机机油发生反应生成油泥，导致发动机部件快速磨损。
C.
窜缸混合气中未燃烧的燃油会稀释发动机机油。
D.
导致进气口的堵塞，结果降低了进气效率。
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A.
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B.
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