飞的笔画顺序是:____。
— I'd like to travel to Moscow for vacation.
— Be realistic! For our poor situation at present, we can't _____ a vacation.
如图中,图甲中的情况为已知,若将图甲中的通电电流方向变为反向(图乙),试画出图乙中线圈的受力方向.线圈这时还在平衡位置吗?