President Joe Biden is leaving office the way he arrived—telling the same economic fairy tale that justified a historic increase in federal spending and destroyed his presidency. Today the White ...
But this time, the urban landscape is different: Modern homes are full of plastic, turning house fires into chemical-laced infernos that burn hotter, faster, and more toxic than their predecessors.
In the elastic deformation stage of the coal body before 3Mpa, the connection of the seepage hole is poor, and the fractal dimension of the seepage hole increases in the early stage of compression.