题目: There's no light oil ,Jackie and his family be at home. [ ]A. oughtn't to B. mustn't C. needn't D. can't 答案: 答案:D
题型:单项选择题 共用题干题 食品腐败变质指食品在一定的环境因素影响下,由各种因素作用而发生的食品成分与感官性状的各种变化肉、鱼、禽、蛋等食品腐败变质的主要特征是()A.蛋白质腐败B.油脂酸败C.碳水化合物酵解D.维生素破坏E.发出醇类气味和甜味 查看答案