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342025-06-28 12:58:03
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352025-06-28 12:58:02
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草坪种植,已知某开发区有一块四边形的空地ABCD,如图,现计划在空地上种植草皮,经测量∠A=90°,AB=3m BC=12m,CD=13m DA=4m,若每平方米草皮需要200元,问需要多少投入?? 前面勾股会,后面问投入不会农业资讯562025-06-28 12:46:03
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