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● RS-232-C的电气特性采用V.28标准电路，允许的数据速率是 （13） ，传输距离不大于 （14） 。 （13） A. 1Kb/s B. 20Kb/s C. 100Kb/s D. 1Mb/s （14） A. 1m B. 15m C. 100m D. 1Km
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【单选题】近年，东营的路边出现了一种风光互补式路灯（如图所示），该路灯装有风力和太阳能发电装置．白天该路灯将获得的电能储存在蓄电池内，夜间蓄电池对灯泡供电．关于该路灯，下面说法不正确的是（　　）
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查看完整题目与答案
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太阳能发电装置是将太阳能转化为电能
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