A.2%~10% B.2‰~10‰ C.0.5%~1% D.0.5‰~1‰
A.一洗二刷三沖四消毒 B.一沖二刷三洗四消毒 C.一刮二刷三沖四消毒 D.一洗二刷三消毒四沖
A.酸奶 B.奶油 C.奶酪 D.牛油