cad如何画一条确定长度直线

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select * from tbl_Articles WHERE ArticleID=1571718 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1571718 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1571718 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1104834,1144371,1104899,626484,655050,1148149,1131806,1010866,1127049,770607,558163,562728,1143391,1072237,530979,533433,84560,806950,1662672,845957,822632,630103,1160987,821955,830080,1093509,1063782,823064,1001546,851627) ORDER BY field (ArticleID,1104834,1144371,1104899,626484,655050,1148149,1131806,1010866,1127049,770607,558163,562728,1143391,1072237,530979,533433,84560,806950,1662672,845957,822632,630103,1160987,821955,830080,1093509,1063782,823064,1001546,851627)