您要查找的是不是：
- A.D.HALL活动矩阵A. D. HALL active matrix
- 参加活动campaign
- 不活动inaction
- 不仅A而且not merely A but also B
- 自由活动swing
- A股A-share
- D对称矩阵D-symmetric matrix
- 社会活动social activities
- 把A误以为take A for B
- 促销活动advertising campaign
- d-析取矩阵d-disjunct matrix
- 实践活动practical activity
- 大型活动large-scale activity
- d-disjunct矩阵d-disjunct matrix
- 社交活动doings
- A/D转换器A/D converter
- 在活动in action
- 不活动的inactive
- A-酉矩阵及其性质A-unitary Matrix and Its Properties
- 活动策划activity planning
