It(形式主语)
hasbeensuggested(谓语)
thatchildrenholdmistakenviewsaboutthe'pure'sciencethattheystudyatschool.(真正的主语,主语从句)
主语从句成分分析:
children(主语)
hold(谓语)
mistaken(adj.作views的定语)
views(宾语)
aboutthe'pure'science(介词短语作宾语补足语)
thatthey(主)study(谓)atschool.(定语从句,限定views)
atschool(状语)这里study的宾语为science,that指代science