正确答案: B
The alkalinity;the detergency
题目:() neutralizes the acid conditions and() cleanses the rings and grooves.
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学习资料的答案和解析:
[单选题]操舵轻快、航向失控的原因可能是()。Ⅰ.舵承配合间隙过大;Ⅱ.舵承损坏;Ⅲ.舵叶丢失;Ⅳ.舵杆折断;Ⅴ.舵承的摩擦力小。
Ⅲ+Ⅳ
[单选题]Failure of fuel injection is usually due to trouble in the ().
fuel injection pum