已知一个电阻值为55Ω的用电器，其额定工作电流为4A，问此用电器两端的电压为多少？
参考答案：
U＝IR＝4×55＝220（V）
—____
—Some rice, please.
A．What about something to drink?
B．Would you like to have lunch with me?
C．May I take your order?
D．Can I help your order?
试述电解槽端极板组合的检修工艺要求？
