低压电力线路的作用是用于分配电能。
参考答案：对
— It is reported that Zhou Senfeng who is only 29 years old has been elected mayor of
Yicheng, Hubei on June 21, 2009.
— He must be the youngest mayor in Hubei, ____ ? [ ]
A. mustn't he
B. isn't he
C. is he
D. must he
除HLR外，还能够存储用户位置信息的节点是（）。
