【判断题】晶体三极管本质上是一个电流控制电流源器件。
【单选题】下列经济业务中,能引起公司股东权益总额发生变化的是
【单选题】下列说法中不正确的是( )
D.
稳压二极管在稳压状态时,它的PN结处在反向击穿状态
【判断题】虚拟人机工程学设计是借助虚拟样机(Virtual prototype)系统。
【单选题】John was good at his work and he was ()to general manager in his company.
【单选题】A good manager identifies the interest of his employees _____ his own .