反应②Fe（s）+H₂O（g）⇌FeO（s）+H₂（g）；△H=Q₂，平衡常数为K₂，

在不同温度下，K₁、K₂的值如下：

   Tom and Gina usually go to school by car .They drive(驾车) pasta cinema a supermarket a post office. The post office is next to the supermarket on Center Street .Mary and Ann usually go to school by bus. They go down Sixth Avenue, past a bank and a library. The bank is across from the library. Jenny usually goes to work by bike,he rides(骑车) past a hotel and three streets．

如图所示，重力为G的均匀木棒竖直悬于O点，在其下端施一始终垂直于棒的拉力F，让棒缓慢转到图中虚线所示位置，在转动的过程中（　　）