【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】已知电路如图所示,R 1 =10Ω,R 2 =40Ω,R L =10Ω,L 1 =5H,L 2 =1H,M=0.5H, ,ω=100rad/s,试求 和 。
【单选题】下面的选项不属于关系数据库的性质的是( )
【判断题】因为极限偏差有正负,所以尺寸公差值可以是0或正值。
【单选题】(Even though) Sedat (has been studying) English for three years before he came (to the United States), It is still difficult for him (to express himself).
【简答题】已知电路如图a所示,U S =48V,R 1 =2Ω,R 2 =R 4 =3Ω,R 3 =6Ω,R L =5Ω,试用戴维南定理求解I O 。
【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...
【简答题】已知电路如图a所示,R 1 =1Ω,R 2 =2Ω,R 3 =3Ω,R 4 =4Ω,R L =5Ω,U S =15V,试用戴维南定理求电阻R中的电流I。
【简答题】电路如图所示。已知 RL= 5Ω,试求电路中的电流 I 。