People in Jinjang are proud of ____they have achieved in the past ten years.

A．what

B．which

C．that

D．how

下列有关化学方程式书写不正确的是[ ]

A．用盐酸除去铁锈：Fe₂O₃+6HCl=2FeCl₃+3H₂O

B．镁带在空气中燃烧： Mg+O₂ =2MgO₂

C．验证铁比铜活泼：Fe+CuSO₄=FeSO₄+Cu

D．用熟石灰处理工业生产中含硫酸的废水：Ca(OH)₂+H₂SO₄=CaSO₄+2H₂O