Give the correct formula and chemical name for the ionic compound: Fe3+ and SO42- Give the correct formula and chemical name for the ionic compound: NH4+ and SO42- Give the correct formula and chemical name for the ionic compound: Na+ and SO42- Give the correct formula...
听力原文： Today I'd like to talk about the sculptor Henry Moore, in particular the ideas his work is based on, and also how he viewed the medium of sculpture．Moore said that to appreciate sculpture a pers...