【正确答案】 A

【答案解析】[听力原文] In order to diagnose and treat abnormal behavior, we have to start with clear definitions of what's meant by abnormal and normal. Criteria must be worked out for distinguishing one from the other in actual clinical cases. The word abnormal implies a deviation from some clearly defined norm. In the case of physical illness, the boundary lines between normality and pathology are often clearly depictedby medical science, making it easier to diagnose. On the psychological level, however, we have no ideal model to use as a base of comparison, nothing to help us distinguish mental health from mental disorder. The problem of defining abnormal behavior via establishing just what is meant by normal behavior has proved extremely difficult. However, as chapter 5 outlines, several criteria have been proposed. One norm described in detail in your text is personal adjustment. An individual who was able to deal with problems effectively without serious anxiety or unhappiness or more serious symptoms is said to be well adjusted. Personal adjustment as a norm has several serious limitations though. For example, it makes no reference to the individual's role in the group. How're we going to classify, for example, the untypical politician or businessperson who engages in unethical practices. Either might be a successful, happy, well-adjusted individual. Obviously, the welfare of the group, as well as that of the individual, must be considered, which brings me to the next approach. What problem concerning abnormal behavior does the instructor discuss? 细节题。根据In order to diagnose and treat abnormal behavior, we have to start with clear definitions of what's meant by abnormal and normal. 可知讨论的是正常行为和异常行为的界定问题。因此，正确答案为A。

【正确答案】 B

【答案解析】[听力原文] Why does the instructor mention physical illness? 细节题。根据In the case of physical illness, the boundary lines between normality and pathology are often clearly depicted by medical science, making it easier to diagnose. On the psychological level, however, we have no ideal model to use as a base of comparison, nothing to help us distinguish mental health from mental disorder. 可知医学科学对身体疾病的常态和病理有着清楚的描述，因此，身体疾病较为容易诊断。然而，在心理层面上，目前并没有一套区分心理健康与心理疾病的完善模式。提出身体疾病是为了与精神疾病对比。因此，正确答案为B。

【正确答案】 A

【答案解析】[听力原文] What will the instructor probably discuss next? 推断题。根据several criteria have been proposed. One norm described in detail in your text is personal adjustment. 和Personal adjustment as a norm has several serious limitations though. For example, it makes no reference to the individual's role in the group. 可知，提出来的界定标准之一“个人适应”有很严重的局限性，没有涉及集体中的个人角色，故可知接下来要讨论衡量正常行为的其他方法。因此，正确答案为A。