【多选题】
以下（ ）特点符合长航时无人机。___
A. 航时不小于50分钟
B. 单向飞行里程不小于30公里
C. 充电时间约20分钟
D. 内置微型PC和4G通信模块
E. 多载荷云台选择，2000W像素可见光相机，红外相机等
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答案
ABCDE
解析
暂无解析
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【判断题】
3智能变电站是采用先进、可靠、集成、低碳、环保的智能设备，以全站信息数字化、通信平台网络化、信息共享标准化为基本要求，自动完成信息采集、测量、控制、保护、计量和监测等基本功能，并可根据需要支持电网实时自动控制、智能调节、在线分析决策、协同互动等高级功能的变电站。
A. 对
B. 错
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