【简答题】在图3-15所示电路中,u s (t)=5costV,R=5Ω,L 1 =1H,|M|=0.1H,L 2 =2H,C=1F。试求耦合电感元件的输入端口电压u 1 (t)和电容电流i C (t)。
【单选题】设行列式 的元素都是正整数,则 的值是 ( )
【单选题】关于护理学基本概念及相关关系的描述,正确的是
【单选题】一、单项选择题(本大题共 25小题。每小题2分,共50分。每小题只有一个正确答案。) 人体发育的起点是
【简答题】L 1 =4H, L 2 =1H, k=0.5 的耦合电感串联的等效电感为 ________ H 。 1) 4 2) 5 3) 7
【单选题】Mike spent two hours driving______ the busy streets yesterday morning.
【简答题】阅读理解。 Paul is a four-year-old boy. His parents are both doctors. They are very busy. They have no time to spend weekends with Paul, so Paul spends lots of time on the Internet, chatting(聊天) with o...
【单选题】Mike spent two hours driving _______ the busy streets yesterday morning.