【多选题】Smaller generators are sometimes self-excited, which means the field coils are powered by thecurrent producedby the generator itself.
A.
较小的发电机有时是自励磁型的,即励磁线图由发电机本身发出来的电流供电。
B.
较小的发电机有时是自励磁型的,即励磁线图被发电机本身发出来的电流供电。
C.
较小的发电机有时是自励磁型的,即励磁线图通过发电机本身发出来的电流供电。
D.
较小的发电机有时是自励磁型的,即励磁线图为发电机本身发出来的电流所供电。
【单选题】The field coils____and the armature is____. This is in fact the arrangement adopted for large, heavy duty alternators.
C.
stationary; stationary
【单选题】需求分析的目的是理清数据流或数据结构,导出完全的、精制的( )。
【简答题】Urafiki kati ya nchi hizi mbili _____________(-dumu)(请用虚拟语气) milele.
【简答题】若集合M={ y | y = },P={ y | y = },则M∩P=' ' ( ) A{ y | y >1} B{ y | y ≥1} C{ y | y >0} D{ y | y ≥0}
【简答题】Kati: Szilvia?Szilvia: ___________________________ Kati: Hi. I'm phoning about our visitors from Stockholm. I'm afraid they've changed their plans.Szilvia: ___________________________ Kati: Yes,...
【单选题】The field coils ____ and the armature is____ . It is in fact the arrangement adopted for large heavy duty alternator.
B.
stationary; stationary