第1题：
Dram
Salient pole
Squirrel-cage
Wound-rotor
第2题：
英译汉：production
第3题：
英译汉：gearbox ratio
第4题：
英译汉：rotor
第5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.