最近 ,笔者下乡发现 ,在许多乡（镇）、村和公路两旁 ,多了一道风景———“科技墙”。在这些“科技墙”上 ,既有有关作物栽培、肥水管理、病虫草害防治等方面的实用技术 ,又有教农民发家致富的经商、营销、提高经济效益的经验 ,等等。在“科技墙”前围观的农民朋友 ,不时在用 Recently, I came to the countryside and found that in many townships (towns), villages and highways, there is a more scenic “wall of science and technology.” In these “science and technology walls”, there are both practical techniques related to crop cultivation, fertilizer and water management, prevention and control of pests, weeds and peasants, and businesses that teach peasants to get rich and get rich, marketing and economic profit-making experiences. From time to time in the “technology wall” peasant friends, from time to time