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Range Queries: R-tree | Pedagogic Modules (nau.edu) An R-tree (Rectange-tree) stores objects in rectangles. The main idea of the R-tree is to construc 阅读全文
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网页里的电脑博物馆 (compumuseum.com) https://www.compumuseum.com/emularity.html?machine=wps97 退出WINDOWS回到DOS, DIR WPS 97,只有26个文件,5.7MB. WIN.BAT可再进入WINDOWS. htt 阅读全文