某一导体两端电压U=220伏，通过电流I=10安培，求导体电阻R等于多少？
参考答案：
根据欧姆定律公式：
导体电阻为22Ω
--- You don't seem to be quite yourself today. What's wrong?
--- Oh, I'm suffering from a cold. Nothing serious, _____.
A．yet
B．indeed
C．though
D．anyway
