回帖：benjaminv:骗流量啊... 免费的到处是: http://app.knovel.com/web/toc.v/cid:kpPTPMRR01/viewerType:toc/root_slug:petrophysics-theory-practice-2/url_slug:petrophysics-theory-practice-2/? (2014-06-25 00:24) 
需要账号吧