经电流互感器的三相四线电能表电流二次回路带电压接法，互感器二次侧不准接地。
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低压装置安装要符合当地供电部门低压装置规程及国家有关工艺、验收规范的要求。
A. 正确
B. 错误
The Cisco Lifecycle Services approach for wireless solutions provides a framework for which of the following opportunities？（）
A. partners having a discussion with customers about the minimum service components needed to successfully deploy a wireless solution
B. customers determining a competitor’s strategy for adopting advanced technologies
C. partners choosing the right products for their customers
D. customers choosing the right products for their network
E. customers defining the correct strategy for advanced technology adoptio
电子商务产品有（）
A. 有形产品
B. 无形产品
C. 服务
D. 数字产品
E. 信息
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