第23题: [单项选择]A.The cells of plants and animals are less damaged by quick freezing. B.It saves time in the food production process. C.It reduces the amount of energy required to freeze the food. D.The food defrosts more quickly. 参考答案:A 答案解析:[听力原文] Why is it important to freeze fresh food quickly
[解析] 题干问为什么新鲜食物要迅速冷冻起来。短文
第24题: [单项选择]班杜拉认为,强化有以下哪三种类型() A. 外部强化、替代强化与自我强化 B. 内部强化、外部强化与自我强化 C. 一级强化、二级强化与三级强化 D. 内部强化、外部强化与替代强化 参考答案:A