单选题：电力负荷应根据下列哪一项要求划分级别？（　　）

题目内容：
电力负荷应根据下列哪一项要求划分级别？（　　） A．电力系统运行稳定性
B．供电的可靠性和重要性
C．供电和运行经济性
D．供电质量要求

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答案解析：

This tower,__________they are planning to have decorated, is

This tower,__________they are planning to have decorated, is always the best pla

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The class ______ so happy，for everyone smiles to you. （　　）

The class ______ so happy，for everyone smiles to you. （　　）A．is B．are C．being D．h

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How much on average is the European Tissue business worth a

How much on average is the European Tissue business worth a month?A．Around 8.5 b

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