To view this page ensure that Adobe Flash Player version 10.2.0 or greater is installed.
Either scripts and active content are not permitted to run or Adobe Flash Player version 10.2.0 or greater is not installed.
姓名: 单位: 联系方式:
在自然界中,许多物体的构造都是相当精确和简约的,科学家从树木的生长中获得灵感,并将某些结构用于机械工具和设计中。