题目

自然界中，动物的有些行为是与生俱来的，是由动物体内的遗传物质决定的，我们称之为先天性行为，也称为。这些行为的反射活动是由以下的神经中枢来完成的，如婴儿吮奶。有些动物的行为是在的基础上，由生活经验和学习而获得的，称为行为。这些行为的反射活动必须由参与来完成，如马戏表演中狗熊骑车等。听下面一段对话，回答第1-3题。 1. What is the relationship between the man and the woman? A. Husband and wife. B. Patient and nurse. C. Customer and shop assistant. 2. What do we know about the man? A. He drinks twice a week. B. He is in poor health. C. He smokes once in a while. 3. What does the woman think about the man's drinking habit? A. He should cut down on his drinking. B. He may keep his drinking habit. C. He should stop drinking completely.