一个正方形的边长增加了2cm,面积相应增加了32cm2,则这个正方形的边长为()
—Is Jay on his way to the cinema?
—I regret ______ you that he can't come today.
地球表面的地形、气候、水文、生物、土壤等要素相互联系、相互制约和相互渗透,构成了( )