These cases suggests that current sheets that separate open and closed magnetic fluxes in the low corona,and oppositely directed open field lines in the high corona are possible sites for bidirectional electron acceleration.

• 2 .；在低日冕分离开放磁场和闭合磁场的电流片；以及高日冕相反方向的开放磁力线的交叉区域可能都是双向电子加速区。