六、Please write the balanced equation, total ionic equation and net ionic equations for the precipitation of magnesium phosphate from the addition of a magnesium nitrate solution to a sodium phosphate solution.

一、請就刑案現場下列材質表面之鞋印提出最適當之記錄及採樣程序：（一）乾燥砂土上之立體鞋印、（二）潮濕磁磚表面泥土鞋印、（三）乾燥磁磚表面灰塵鞋印、（四）報紙表面灰塵鞋印、（五）報紙上血跡鞋印。