单选题

Phase letter "V" shall be used as a suffix on the cable identification code to identify the ungrounded wire or cable that is in a single phase system.

A导线识别代码的后缀应使用“V”字母作为后缀，以识别单相系统中未接地的电缆或导线。

B导线识别代码的前缀应使用“V”字母作为后缀，以识别单相系统中未接地的电缆或导线。

C字母“V”应用作前缀以识别导线代码和单相系统中未接地的导线或电缆。

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正确答案：A （备注：此答案有误）

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