Serval questions concerning absorbed dose have been studied. The mass energy-absorption coeffients Uen/ρ for some traditional mixtures are reported, the linear relations between the H percent of animals, plants and other organic materials and their Uen/ρ values are found out, it's correlation coefficient r is 0.9999, for the above materials, the element composition of ash are analyzed and their Uen/ρ are tabusted, their equivalent has been studied, finally, the restriction on ,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42649102&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42649117&type=,http://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=42649116&type=, arediscussed.