According to the passage,what involves in charging a battery right now?

科目名称：理工英语3

试卷号：11377

题型：单选题

题目：According to the passage,what involves in charging a battery right now?

选项：A. Wires,chargers and plugs. B. Wires,chargers and sockets. C. Sockets, plugs and chargers.

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答案：Wires,chargers and sockets.