在我们日常的劳动与生活中,可以提出许许多多“为什么?”为什么庄稼要长叶子?为什么骡子不下驹?为什么双交种玉米能增生?为什么在祁县春季刮东北风会下雨?为什么抽水机能抽水?……。这些问题,都是我们经常碰到的也很熟悉的,里面却包合有不少的科学道理。一旦弄清楚了,我们就能知道庄稼生长的特点,牲口的脾性,天晴天雨的原因,农业机器的性能,从而一定能更加自觉地种好庄稼,喂好牲口,了解地 Why do we need to grow leaves? Why mules do not go down? Why double cross-species corn can proliferate? Why Qixian spring blowing northeast wind will rain? Why Is the pump pumping? These problems are all familiar to us and often involve a lot of scientific truths. Once we have figured it out, we can know the characteristics of crop growth, the virulence of animals, the reason for fine weather, and the performance of agricultural machinery, so that we can better plant crops more consciously, feed our animals better,