质量和密度是初中物理的重要内存也是各地中考的必考内容．纵观近两年各地的中导试题，有关质量和密度的知识常U下列几种类型出现．一、概念型gIJI一实心铝块的密度是27克／厘米’，把它平分成三块，每块的密度是（）A．0．9克／厘米311．2．7克／lq｛米’C．8．1克／厘米’I） Quality and density are important memory for junior high school physics. Throughout the survey questions in various places in the past two years, knowledge about quality and density often appears in the following types. First, the density of a solid aluminum block of the concept type gIJI is 27 g/cm’. Divide it into three pieces. The density of each block is ()A. 0.9 g/cm 311.2.7 g/lq {m’C’. 8.1 g/cm’I)