交流接触器CJ12-150/3中的”3”表示（） ["额定电流","额定电压","设计序号","极数"]
帧中继技术是在OSI的（）上用简化的方法传送和交换数据的一种技术 ["物理层","数据链路层","网络层","传输层"]
That right can and will triumph（）might. ["upon","on","over","off"]
检查制动电磁铁线圈的温度应不超过（） ["85℃","105℃","125℃"]
铣削不锈钢和钛合金材料时，若用硬质合金铣刀作高速铣削，则应选用（）类刀片。 ["YG","YT","YW","YS"]
CRH2A动车组设备远程控制主要有哪些控制项目？
