单项选择题
A．sprayed with pesticides B．in pour physical condition C．facing an infrared scanner D．exposed to excessive sun rays
A．The need for agricultural advances to help feed a growing population. B．The development of safer machines demanded by the labor movement. C．Machinery that contributed to the agricultural revolution. D．New Jersey as a leader in the agricultural revolution.
A．Knowledge Is Power B．How to Retain and Use Knowledge C．Physical and Mental Efforts D．The Trained Mind Is What One Needs