zs1开关设母线隔室内的主母线为“D”型母线，材料为铝或铜，接触面镀银并套着热缩绝缘层。
参考答案：对
根据句意及首字母提示填写单词。
1. The children are wearing all kinds of animal m________ at the make-up party.
2. She is p______ playing the piano in the music room.
3. There are s________ books about biology on the bookshelf.
4. Our principal p________ the school team for their good performance (表演).
5. Tom gets up e______. He is often the first one to get to school.
卖点是( )。
A．产品所独有的难以被竞争对手模仿的，同时又是可以展示和能够得到目标客户认同的特点B．产品所具有的可以和别的商品进行等价交换的特性C．产品可以在市场上流通的特性D．产品可以被客户接受的特性
