如下图所示，在圆形线圈的中点有一小磁针，当通以由a到b的电流时，小磁针的北极将___________。
转向纸里
摩擦：生热
A．冬天：寒流
B．海啸：灾难
C．高薪：养廉
D．位高：权重
The volcano erupted violently , yet the village at the foot of it should _________.
A．come through
B．go through
C．get through
D．pass through
