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:
地球的两极,无人居住,为什么它们的环境如此恶劣,它们的变化也反映着整个地球环境的变化。