【判断题】If you catch a cold and go to see a doctor, you may say: I have a running nose and a sore throat.
【单选题】如图 已知 E =12.5 V , R 1 =10 Ω, R 2 =2.5 Ω, R 3 =5 Ω, R 4 = 20 Ω, R =1.5 Ω.利用戴维南定理求: 电阻 R 的电流。
【单选题】If you catch a cold,you should see the _____ in the hostital?
【单选题】If you catch a cold, your nose are likely to be conjested or stuffed. In this case, you can say you have a _____ nose, or your nose is _______.
【单选题】If you sleep less than 7 hours a day, you are more to catch a cold.
【单选题】If you catch a cold,you should see the _____in the hospital?
【简答题】电路如题图E2—15所示,已知:E1=E2=E3=10 V,R1=2Ω,R2=R3=R4=1Ω, I=10A,求:E=?