A：科学执政
B：依法执政
C：民主执政
D：德治与法治相结合
两相邻匀强磁场区域的磁感应强度大小不同，方向平行．一速度方向与磁感应强度方向垂直的带电粒子（不计重力），从较强磁场区域进入到较弱区域后，粒子的（ ）
Friday, May 6
arrive in Beijing
Saturday, May 7
go to Tian'anmen Square
Sunday, May 8
go to the Palace Museum
Monday, May 9
go to the Great Wall
Tuesday, May 10
shop in Beijing
Wednesday, May 11
go home
Li Ming，Danny，Jenny and Mrs. Li will go on a trip to Beijing. Look！Here's their plan.
They arrive in Beijing on Friday，May 6.
