They()each other for more than twenty years.
A、don't see
B、didn't see
C、haven't seen
D、hadn't seen
A、don't see
B、didn't see
C、haven't seen
D、hadn't seen
A、A.They pass messages by modifying each other’s member variables B、B.They pass messages by modifying the static member variables of each other’s classes C、C.They pass messages by calling each other’s instance member methods D、D.They pass messages by calling static member methods of each other’s classes.
A、the author complains about her parents" being too understanding B、the author has been studying marriages for more than 20 years C、people divorced mainly because they didn"t love each other D、some people divorced because they couldn"t understand each other
A、arranged as close to each other as possible to save space B、arranged far away from each other for convenient operation C、be fixed or clamped to avoid vibration D、kept easy removable as to convenient repairing work