【简答题】下图所示电路的U1=______V, U2=__________V.
【单选题】Why do you often _______ with Hans?
【简答题】A.spoke B.typed C.introduced D.chatted
【单选题】下图所示电路中, u I1 = − 2V , u I2 =1V ,放大电路的输出电压 u O 为( )。
【单选题】During the ______ the audience strolled and chatted in the lounge.
【简答题】A.chatted with B.looked at C.laughed at D.talked about
【简答题】[ A] chatted with [ B] looked at [ C] laughed at [ D] talked about