Which of the following distinguishes transient tic disorder from chronic motor or vocal tic disorder and Tourette''s disorder?
- A: age of onset
- B: the presence of motor tics only
- C: the presence of vocal tics only
- D: the presence of both motor and vocal tics
- E: temporal progression of the tic symptons
查看答案确认
查看答案将消耗1积分，是否继续？