近几年的中考试题中不断出现了一族新的关于计算物质密度的新题型,所提供的数据用常规方法很难求解,考生只有综合运用力学中的其它知识方能解决.这一类试题综合性强,能考查学生的分析能力和综合运用知识的能力,且对培养学生的创新意识有所帮助,符合素质教育的原则. In recent years, there has been a new family of new questions on the calculation of material density in the mid-term examination questions. The data provided is difficult to solve with conventional methods. Candidates can only solve this problem by comprehensively using other knowledge in mechanics. The test questions are comprehensive and can examine students’ analytical skills and their ability to comprehensively use knowledge. They also help to cultivate students’ sense of innovation and are in line with the principles of quality education.