Warning: file_put_contents(/home/www/wwwroot/zidian/69228.com/cache/0ba8baf9d55da04510ad8374287c7099.txt): failed to open stream: No space left on device in /home/www/wwwroot/zidian/69228.com/index.php on line 55 欧美日韩一区二区三区自拍,亚洲欧美日韩久久,A漫禁漫堂导航
At the same time, we successfully estimated the annual erosion rate by applying the theory of "gray system"model GM (2, 1). 用灰色系統(tǒng)的GM（2，1）模型，本文較爲(wèi)成功地預(yù)測了年際間的侵蝕率。