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问题 多项选择题

电力负荷特性分析应至少包括以下主要内容（）。

A.日、周、月、季、年主要负荷特性统计、分析

B.周、月、季、年典型日负荷曲线分析

C.年持续负荷曲线分析

D.负荷概率分布分析

答案

参考答案：A, B, C, D

单项选择题

对瓷横担的叙述错误的是（）。

A、电气性能好

B、结构简单

C、安装维护方便

D、机械强度高
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单项选择题

Which of the following is least accurate with regard to advertising for firms operating under monopolistic competition（）

A. The increase to average total costs associated with advertising increases as output increases.

B. Advertising expenses are high relative to perfect competition and monopoly.

C. Advertising is necessary to communicate the unique features of a firm’s products.
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