知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。I.R.C. § (ix) an agricultural analysis Group instantly engaged in the continual Energetic carry out of agricultural study (as outlined in area 1404 of your National Agricultural Exploration, Extension, and Instructing Plan Act of 1977) in conjuncti