船舶登记的种类包括:()I、光船租赁登记;II、船舶抵押权登记;III、变更和注销登记;IV、船舶所有权登记 ["I~IV","I~III","II~IV","I、III、IV"]
室内配线暗敷是指:()等处的暗管敷设。 ["A、在抹灰层下面","B、屋面板内","C、地板内","D、地面","E、墙壁内"]
用以太网方式做网管时,需要接()接口。 ["A、Ethernet","B、SCM-MCU","C、COM3","D、Ext clock"]
PPPoE是()上传输PPP的一种方法。 ["ADSL","以太网","ATM","局域网"]
室内的电气安装和配线施工,应做到()。 ["A、安全","B、可靠","C、经济","D、便利","E、美观"]
制动器制动力矩不够有哪些情况?