某无色溶液中，若加入溴水，溴水褪色，若加入NH₄HCO₃，固体溶解并产生刺激性气味的气体，则该溶液中可能大量存在的离子组是[ ]

A．Na⁺、Mg²⁺、S^2-、ClO^-

B．H⁺、Na⁺、SO₄^2-、NO₃^-

C．K⁺、Ca²⁺、OH^-、SO₃^2-

D．Na⁺、K⁺、Cl^-、OH^-

The satellites over the major ocean regions cover the globe（）.

A.besides the polar regions

B.including the North Pole and the South Pole

C.above 70°N and below 70°S

D.as for north and south as 70°