题目

In the early decades of the United States, the agrarian(土地的) movement promoted the farmer as society’s hero. In the minds of agrarian thinkers and writers, the farmer was a person on whose well-being the health of the new country depended. The period between the Revolution, which ended in 1783, and the Civil War, which ended in 1865, was the age of the farmer in the United States. Agrarian philosophers, represented most eloquently by Thomas Jefferson, celebrated farmers extravagantly for their supposed centrality in a good society, their political virtue, and their Superior morality. A小明骑车上学有一段上坡路，在骑车骑不动时他就会走“S”形路线，通过对简单机械的学习他知道了这样做的好处是 [     ]A．省距离B．省力C．省功D．费力但省时间