sql error: select id,classid,ttid,onclick,plnum,totaldown,newspath,filename,userid,username,firsttitle,isgood,ispic,istop,isqf,ismember,isurl,truetime,lastdotime,havehtml,groupid,userfen,titlefont,titleurl,stb,fstb,restb,keyboard,title,ftitle,daan,newstime,titlepic,smalltext,diggtop from ***_ecms_news order by rand() limit 10
需要320g kmno4
展开全文阅读m(kmno4) = 39 55 16 * 4 = 160
m(o) = 16
设共需要x gkmno4:
4 * m(o) / m(kmno4) = m(o) / m(kmno4) = 128 / x = 64 / 160
解得x = 320