问答题 Memory is involved when a rat gives up eating grain because he has sniffed something suspi- cious in the grain pile. ( Passage 2 )

【正确答案】当一只老鼠在粮食堆里嗅到可疑的味道时，它就会放弃吃，此时就是记忆在发挥作用。
【答案解析】