如何测量接地电阻

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select * from tbl_Articles WHERE ArticleID=1567334 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=1567334 LIMIT 0,1
select * from tbl_Articles_sphinx where id=1567334 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(109401,2943538,108642,1072739,109049,1123835,928135,1835700,111028,112581,2214221,113792,1129805,110836,107782,2432170,108683,1089840,107779,115757,109059,2337165,116714,110540,109340,113555,115779,1825067,1076478,1062971) ORDER BY field (ArticleID,109401,2943538,108642,1072739,109049,1123835,928135,1835700,111028,112581,2214221,113792,1129805,110836,107782,2432170,108683,1089840,107779,115757,109059,2337165,116714,110540,109340,113555,115779,1825067,1076478,1062971)