【简答题】按图中所示的参考方向和数值,指出各元件中电压和电流的参考方向。 图1 图2
【简答题】CT74、CT74H、CT74LS三个系列的TTL集成电路,其耗最小的是______;速度最快的是______;综合性能指标最好的是______。
【简答题】按图中所示的参考方向和数值,指出各元件中电压和电流的实际方向。 图1 图2
【简答题】A.It is a policeman. B.It is an educative TV show in Ivory Coast. C.It is an educative TV show in South Africa. D.It is an educative TV show in India.
【简答题】A.It is an act of despair. B.It is an act of selfishness. C.It is the result of a sudden decision. D.It is the result of a sense of guilt.
【单选题】下列支出中,不属于销售费用内容的是( )。