【单选题】It was last Sunday she met her old friend in the supermarket.
【单选题】It was last Sunday ______ we saw one of my old friends in the park.
【单选题】It was__last Sunday morning. It rained__.
【单选题】—So when did you meet Joan? —It was last Sunday _______ she came to visit my sister.
【简答题】测得工作在放大电路中两个晶体管的三个电极电流如下图所示, 1判断它们各是NPN管还是PNP管,在图中标出e,b,c极; 2估算晶体管的 α 和 β 值。
【单选题】测得工作在放大电路中两个晶体管的三个电极电流如下图所示,三个电极从左到右依次为( )
【简答题】从方框中选择合适的选项完成短文。 Last Sunday My class went to the Central Zoo last Sunday. It was our first journey and we were all very happy. 1 Halfway to the zoo we stopped at a station because the driver of the b...
【单选题】It was last Sunday___I came across Mr. Brown.
【单选题】如图所示电路中,测得工作在放大状态的某个晶体三极管两个电极电流,则第三个电极的电流大小、方向和管脚自左到右的顺序分别为( )。