A:32
B:1
C:13
D:23
如图所示,一电子枪发射出的电子(初速度很小,可视为零)进入加速电场加速后,垂直射入偏转电场,射出后偏转位移为y,要使偏转位移增大,下列哪些措施是可行的( )
Peter will _______ his post as the head of the travel agency at the end of next month.