【简答题】在图1.14所示电路中,电源电动势E=120V,内电阻R s =0.3Ω,连接导线电阻R W =0.2Ω,负载电阻R L =11.5Ω。求:(1)通路时的电流、负载和电源的电压,负载消耗的电功率、电源产生和输出的电功率;(2)开路时的电源电压和负载电压;(3)在负载端和电源端短路时电源的电流和电压。
【简答题】语法填空。 阅读下面短文,按照句子结构的语法性和上下文连贯的要求,在空格处填入一个适当的词或使用括号中词语的正确形式填空。 My friend Vernon Davies kept birds. One day he phoned and told me he was going away for a week. He asked me to feed 1 birds for him and sa...