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一、问题 (概念部分 ) 1 如图 1,在升旗仪式中 ,当红旗还没有升起时 ,我们的目光是向前看的 ,这时视线是水平的 ,当国旗冉冉升起时 ,我们的目光随着红旗慢慢仰起 ,同学们向悬挂在旗杆顶端的国旗行注目礼 ,这时 ,我们的视线是在水平线上方的 ,视线与水平线之间形成了一个角
I. Problem (conceptual part) 1 As in Figure 1, at the flag-raising ceremony, when the red flag has not yet risen, our gaze is to look forward. At this time, the line of sight is horizontal. When the flag rises, our With the red flag slowly rising, the students were paying attention to the flag hanging on the top of the flagpole. At this time, our line of sight was above the horizontal line, and a line of sight was formed between the line of sight and the horizontal line.