平面图形中的线分为哪几种

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SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(585298,1068708,1100527,1091304,1093396,1042815,1067795,1106116,1132005,1111870,1109040,1103556,1072138,1113025,1073846,1078677,1072797,1074824,1085854,1080098,1046512,1110546,1103851,1110113,1077100,1109887,1104539,1084197,1089040,1051075) ORDER BY field (ArticleID,585298,1068708,1100527,1091304,1093396,1042815,1067795,1106116,1132005,1111870,1109040,1103556,1072138,1113025,1073846,1078677,1072797,1074824,1085854,1080098,1046512,1110546,1103851,1110113,1077100,1109887,1104539,1084197,1089040,1051075)