change AC to DCcurrent
change DC to AC current
neutralize a armature reaction
carry current to the outside circuit
第1题：
describe the procedure to start an emergency generator ?
第2题：
The boy brushes his ________（牙齿） every day．
第3题：
The child brushes her ______ every day.
A、tooths
B、teeth
C、teeths
D、tooth
第4题：
画笔（Brushes）调板中共包含四种类型的笔刷，下列哪项不包含其中？（）
第5题：
金风2.5WM机组The Switch变流器机侧整流器控制盒内，槽位A安装的是数字量输入板，其DIN2端口接入的信号为（）。
第6题：
Which of the following components are used to convert alternating current produced in the generator windings to direct current?
A.Armature and equalizer
B.Commutator and brushes
C.Rotor and interpoles
D.Field and exciter
第7题：
At six o-clock she gets up，then brushes her____(tooth)．
第8题：
In a modern three-phase A.C. synchronous brushes generator, the excitation winding is on the rotor. That means .
A.The generator need not excitation.
B.The winding on the rotor is for inputting excitation current.
C.There are three phase windings on the rotor.
D.The generator has no brushes.
第9题：
画笔（Brushes）调板中包含边线画笔（Stroke Brushes）（）
第10题：
下列有关画笔（Brushes）调板描述不正确的是：（）