公用供电设备建成投产后，由（）统一维护管理，经电力管理部门批准，供电企业可以使用、改造、扩建该供电设备。
参考答案：供电单位
根据括号里所给的汉语写出英语单词。
1. Are you______(有空)tonight?
2. Which are your favorite ______(动物).
3. I have two ______(家兔) , and they are very cute.
4. —What time is it?
—It's a _____(一刻钟) past eight.
5. There are a ______(一百) chickens in this area.
进行城镇住户调查有代表性的样本量为（）户。
A．65400
B．80000
C．100000
D．200000
