【单选题】For a wound rotor type asynchronous motor, the electric power is connected to its ______.
C.
stator and rotor windings
【单选题】The flat is too expensive and too big, _____, I've grown fond of our little rented flat. [ ]
【单选题】What type of rotor is used in split-phase motors?()
【单选题】采暖系统中,膨胀水箱安装在系统的哪个位置?
【简答题】膨胀水箱的作用是什么?在自然循环热水采暖系统和机械循环热水采暖系统中,它的安装位置分别在何处?
【单选题】配电箱、盘、柜的安装位置应正确,且不得安装在( )正下方。