随着改革开放的进一步深入，社会主义市场经济的逐步形成，活跃的经济领域导致经济案件日益增多。特别是合同和各类票据的签名案件，已成为文件检验技术鉴定工作的一大难题。这一类案件主要特点是检验材料字迹少，书写特征不明显，易模仿，比对难度较大，时间紧。因而，检验这? With the further deepening of the reform and opening up and the gradual formation of a socialist market economy, the number of economic cases has increased due to the active economic situation. In particular, the signing of contracts and various types of bills has become a major challenge in document inspection of technical appraisals. The main features of this type of case is less testing materials handwriting, writing characteristics is not obvious, easy to imitate, compared to the more difficult, time tight. So, test this?