A:HCOOH+H2O⇌HCOO﹣+H3O+
B:CO2+H2O⇌HCO3﹣+H+
C:CO32﹣+H2O⇌HCO3﹣+OH﹣
D:HS﹣+H2O⇌S2﹣+H3O+
平面直角坐标系中,以点P(0,1)为中心,把点A(5,1)逆时针旋转90°,得到点B,则点B的坐标为____.
当今世界,各国之间激烈的竞争,归根到底是竞争 ( )