操场上插几根长短不同的竹竿,在同一时间里测量竹竿长和相应的影长,要时间
操场上插几根长短不同的竹竿,在同一时间里测量竹竿长和相应的影长,要时间
数学人气：446 ℃时间：2020-03-21 11:49:54
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操场上插几根长短不同的竹竿,在同一时间里测量竹竿长和相应的影长的比相等.
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