服务人中在上岗时精神饱满，关闭整齐，充满
D
暂无解析
Wherewas__________youmetwiththefamousscientist?
履行国际间双边或多边贸易协议的基础是实行()。
Forsomereason,it__________alldayoverthetwoweeks.
若A、B为5阶方阵，且Ax=0只有零解，且r(B)=3，则r(AB)=_________________.
Willyou_________playingbasketball?
