井下电气设备的额定电压等级低压不应超过660V。（）_爱下问搜题

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问题判断题

井下电气设备的额定电压等级低压不应超过660V。（）

答案

参考答案：错

单项选择题

氟化钠溶液每周含漱一次的氟浓度是

A．0.2%

B．0.02%

C．0.5%

D．0.1%

E．0.05%

问答题

Explain and distinguish between the following terms in relation to the doctrine of precedent in the Scottish legal system:

(a) ratio decidendi and obiter dictum; (4 marks)