A 28-year-old accountant is admitted to the neurologic unit after a sudden onset of blindness the day before an important project is due for her boss. After preliminary evaluation and testing yields no positive findings, the physician’s initial reaction is that the client may be demonstrating which defense mechanism
A. Repression.
B. Transference.
C. Reaction formation.
D. Conversion.
参考答案：D
解析：A person can convert unbearable feelings into a physical symptom with no organic cause. This defense mechanism usually manifests itself near the time of a traumatic or conflict-producing event. The symptom commonly provides attention or a means of escaping the conflict. Repression is a defense mechanism in which a person unconsciously keeps unwanted feelings from entering awareness. Transference involves the projection of feelings, thoughts, and wishes (positive or negative) onto someone, usually a therapist, who represents a figure from the person’s past. Reaction formation is a means of alleviating unresolved conflicts between feelings or impulses by reinforcing one feeling and repressing another, thereby disguising the true feelings from the self.
和
的两个相邻的条形区域中分别有匀强磁场和匀强电场，磁场方向垂直于纸面向里，电场方向与电、磁场分界线平行向右。一带正电的粒子以速率v从磁场区域的上边界的P点向下成θ=60º射入磁场，然后以垂直于电、磁场分界线的方向进入电场，最后从电场边界上的Q点射出。已知PQ垂直于电场方向，不计重力。求电场强度和磁感应强度大小之比，以及粒子在磁场与电场中运动的时间之比。