题目内容

蓄电池提供给用电设备的电压是()

A. 12V
B. 24V
C. 36V
D. 15kV-30kV

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当免维护蓄电池的充电指示器显示绿颜色是表示需要充电。( )

A. 对
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发动机每次启动时间不宜超过5s。( )

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点火线圈其实就是个变压器,将蓄电池12V的低压电变为15kV-30kV的高压电。( )

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