第19题: [多项选择]()教师资格相互通用 A. 高级中学教师资格 B. 中等职业学校 C. 初中 D. 小学 参考答案:A,B
第20题: [单项选择]The division of the kilowatt load between two AC generators operating in parallel is controlled by the settings and characteristics of the (). A. voltage regulators B. field rheostats C. reverse power relays D. prime mover governors 参考答案:D