单选题Which of the following devices can route electrical signals only when activated by an external control signal？（）A SolenoidB RelayC ClutchD Capacitor

题目

单选题

Which of the following devices can route electrical signals only when activated by an external control signal？（）

Solenoid

Relay

Clutch

Capacitor

参考答案和解析

正确答案： A

解析：暂无解析

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PD0-001

单选题Which of the following devices can route electrical signals only when activated by an external control signal？（）A SolenoidB RelayC ClutchD Capacitor

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参考答案和解析

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