正确答案: A

平行

题目：偏移反映了两相邻轴轴心线呈（）的状态。

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学习资料的答案和解析：

[单选题]In a commonly used fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.

a settling tank

[单选题]Theoretical perfect combustion in a diesel engine yields by-products of （）.

water vapor and carbon dioxide