【简答题】A.He was housed by Emma Thompson five years ago. B.He has graduated from an England university. C.He has become a British citizen. D.He will be 15 years old in April.
【简答题】电路如图6.16所示,已知u 2 = ,稳压管U Z =10V,I Z =5mA,I ZM =50mA,R=200Ω,R L 可调。试求: (1) 当开关S闭合时,求U i 和U o 值,并标出U i ,U o 及电容器C的极性; (2) 当开关S断开时,求U i 值,画出U o 的波形图; (3) 根据题中所给数据,求R L 的调节范围。
【简答题】根据短文后所给的任务,完成小题. Now the idea of “car sharing” has become popular in Europe and the United States. That’s to say, people share(分享) one car, not each person has one . (65) As we know, most cars are par...