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全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶电气与船舶安全

单项选择题

（） the oxygen content in the exhaust gas, （） the combustion is.

A.The lower；the worse
B.The higher；the better
C.The lower；the better
D.The highest；the worst

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