单选题
发布日期:2021-03-22
pump bearings in poor condition
excessively worn actuator-piston packing
broken directional control valve centering springs
low hydraulic oil viscosity
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发现精神突变旅客安排座席时,安排在车厢一端座席以“三人座席坐中间,两人座席坐()”为原则。
桂枝的功效是()。
按《地下防水工程质量验收规范》(GB50208-2011)5.1.4,在施工缝处继续浇筑混凝土时,已浇筑的混凝土抗压强度不应小于()。
()是指保险合同当事人中至少有一方并不必然履行金钱给付义务。
经济学家提出模型的主要理由是()
说明溴酸钾法测定异烟肼的原理与滴定度的计算。
饭店应该设有医疗室,如果有客人在客房里得了急病,就可以及时予以适当的处理,再迅速送往医院治疗,这是为了满足客人的求安全心理。
包装过程中使用的字模如退回时发现缺失,则下列说法错误的是()。
胶印机中,压印滚筒的包衬是()。
本题哪项不符合消防安全标志的防火巡查要点内容:()
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