【简答题】电路如图3.5.1所示。 (1)说明该电路由几级组成,各级分别是哪种形式的放大电路(如CE、CC或差放等); (2)分别说明各级采用了哪些措施来改善其性能指标(如提高增益和输入电阻等)。
【判断题】在 成本分析模式与 存货模式下, 均需要考虑 持有现金的机会成本。
【单选题】“思想开朗、兴趣广泛、喜新奇、好冒险”,其心理类型属于哪种?
【判断题】植物界的分类单位排列顺序为界、目、纲、门、科、属、种。
【简答题】How to keep healthy? It's easy for us to catch a cold in winter and spring because the weather changes a lot in spring and it is too cold in winter. But if we take care in our life, all of us can keep...