【简答题】电路如图2—16(a)所示,已知E=10 V、IS=1 A,R1=10Ω、R2=R3=5Ω,试用叠加定理求流过R2的电流I2和理想电流源IS两端的电压US。
【简答题】电路如题图E2—8所示,已知US1=20 V,US2=10V,US3=10 V,R1=R4=10 kΩ,R2=R3=R5=5 kΩ。求电阻R4两端电压。
【单选题】当散热器组对成组时,各片之间彼此吸收辐射热,热量不能全部散出,23片散热器的片数修正系数是( )的数。
【简答题】Don't forget to ________ the equipment before setting up the experiment. A) try in B) try on C) try for D) try out
【单选题】Linux系统下的欺骗库函数病毒使用了Linux系统下的环境变量,该环境变量是()
【简答题】What is wrong with a film by setting up a camera before the stage? [A] Fewer and fewer people will go to the theatre. [B] The audience cannot see what is going on on the stage. [C] The scene ca...