正确答案: A
90°
题目:双缸四作用电动往复泵曲柄互成( )。
解析:A
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举一反三的答案和解析:
[单选题]非正常损坏的零部件,应尽可能原样保存好,其目的是______。Ⅰ、便于日后分析研究其损坏原因;Ⅱ、避免重复损坏;Ⅲ、依据验证报告和事实提请索赔。
Ⅰ+Ⅱ+Ⅲ
[单选题]应慎用阿司匹林的疾病是()
胃溃疡
[单选题]救生艇按结构形式可分为:
开敞式、半封闭式、全封闭式。
[单选题]A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the
compensating needle valve
[单选题]船用油水分离器每隔()拆检、清洗、维修一次,以保其工作性能
一年