【单选题】与if语句中的表达式x==0等价的表达式是
【单选题】电路如图所示。已知u S1 =10V,i S1 =1A,i S2 =3A,R 1 =2欧,R 2 =1欧。电压源、 电流源1、电流源2吸收的功率分别为( )。
【单选题】在图 1 所示电路中,已知 U S =10V , I S =2A ,外电路电阻 R =10 W ,图 1- ( a )中电压源及图 1- ( b )中电压源均是 功率。
【简答题】•What differences between senior high school and university have you noticed since you have entered our school? Have these differences caused any pressure on you? •What pressures have you felt during...
【单选题】一 What attracted you to our university? 一 You have a great basketball team and I can _____ for it. [ ]