Medium speed engines have a _____ power to weight ratio than the slow speed two strokes b

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Medium speed engines have a _____ power to weight ratio than the slow speed two strokes, but due to the higher speeds tend to have _____ maintenance intervals.

A.higher/reduced

B.higher/increased

C.lower/reduced

D.lower/increased

请帮忙给出正确答案和分析,谢谢!

热搜:关于氨基酸代谢错误的论述是_________。