- The radio says it will rain next Sunday.
- _____. We're going for a picnic that day.
(1)如图1所示,请根据电流方向,标出通电螺线管的N极和S极.
(2)组装如图2所示的滑轮组,使绳自由端拉力F最小.
我们的家乡戏是____。