A、Ni(OH)<span style="font-size: 13.3333px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em;">2</span>
B、Fe(OH)<span style="font-size: 13.3333px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em;"> 3</span>
C、Zn(OH)<span style="font-size: 13.3333px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em;">2</span>
D、Al(OH)<span style="font-size: 13.3333px; line-height: 0; position: relative; vertical-align: baseline; bottom: -0.25em;">3</span>