题型:填空题 — _____? —I can't find my bag. [ ]A. What's matter B. What's the wrong C. What's the matter 查看答案
题型:填空题 复方硫磺洗剂处方:沉降硫磺30g、硫酸锌30g、樟脑醑250ml、羧甲基纤维素钠5g、甘油100ml、蒸馏水加至1000ml,其中羧甲基纤维素钠作为()A.润湿剂B.助悬剂C.防腐剂D.矫味剂E.增溶剂 查看答案