单选题:To keep digestive tract running smoothly and disease-free,ai 题目分类:英语六级 题目类型:单选题 查看权限:VIP 题目内容: To keep digestive tract running smoothly and disease-free,aim for_______. A.a diet high in fiber B.a diet high in fat C.food high in vitamins D.food high in beta carotene 参考答案: 答案解析:
关于有机磷杀虫剂的叙述,错误的是 关于有机磷杀虫剂的叙述,错误的是A.其主要机制是抑制乙酰胆碱酯酶 B.主要在肝脏进行生物转化 C.在肝脏氧化后浓度减小 D.吸收6~12小时血中浓度达高峰 E. 分类:英语六级 题型:单选题 查看答案