五一假期,某景点为了给游客提供便利,在广场大屏幕上滚动播放景区的实时动态信息,已知大屏幕下端
离地面3.5米,大屏幕高3米,若某位游客眼睛离地面1.5米,则这位在距离大屏幕所在的平面多远,可以获得观看的最佳视野?(最佳视野是指看到屏幕上下夹角的最大值)( )
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更新时间:2024-05-23 18:27:35
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【推荐1】海水受日月的引力,在一定的时候发生潮涨潮落,船只一般涨潮时进港卸货,落潮时出港航行,某船吃水深度(船底与水面距离)为
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【推荐2】如图,树顶A离地面的距离
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【推荐1】古印度数学家婆什伽罗在《丽拉沃蒂》一书中提出如下问题:某人给一个人布施,初日施2子安贝(古印度货币单位),以后逐日倍增,问一月共施几何?在这个问题中,以一个月
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