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为什么有的电脑屏幕手写笔需要充电，有的不需要？
2026-04-23
网络整理
佚名
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Key Point:为什么有的电脑屏幕手写笔需要充电，有的不需要？答：当然是因为原理不同，从是否需要内置电源的角度来看，手写笔其实分为有源笔和无源笔。无源笔其实在塞班时代就出现了
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2026-04-23
网络整理佚名550
