下列卤代烃能发生消去反应的是( )
答案:B
卤代烃发生消去反应的条件为:1、分子结构中至少有2个C;2、与卤原子相连的碳原子的相邻碳上必须要有H;则满足此条件的选项为B;
In dealing with public relations, we should make every effort to prevent the _____ in personality. [ ]
A. contact
B. contrast
C. connection
D. conflict
步步高卡可享受哪些积分服务?