AV免费在线观看,国产一级AV免费,大陆精品国产AV成拍色拍,国产色播色爽看到爽,国产成人av在线影音

    <wbr id="6nsdu"><ins id="6nsdu"></ins></wbr><b id="6nsdu"><pre id="6nsdu"></pre></b>

      <rp id="6nsdu"><ins id="6nsdu"></ins></rp>

    1. Zhangjiajie’s mountains belong to what landform?

      from:Zhangjiajie News Network writer: Read:

        張家界地貌.jpg

       

          Zhangjiajie landform is one unique type of sandstone landforms, it is “in the South China plate tectonic setting and humid subtropical zone. The near level middle and upper devonian quartz sandstone is of the landscape parent rock, formed due to water erosion, gravitational collapse, weathering and other agent. The tall pillar forest with straight edges is multitudinous, and the deep valley, stone wall, natural bridge, mesa, platform and other landform are as the representative landscape”.
       

      Comment A total of comments
      Name: Address:
      Key : Anonymous