零售结构调查重点在于对（）、行为构成及店铺构成、（）的调查。
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输入电压及其变化范围、输出电压及其调节范围、额定输出电流以及过流保护电流等都是稳压电路的特性指标。
During the late 18th and early 19th century, the romantic trend in the development of novels was represented by Walter Scott, who was mainly famous for his ________ romances.
店址是零售店铺确定经营目标和制订经营策略的重要依据。（）
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