答案:【计分规则】: ⑴ Definition of feeding standards: a complete set of nutritional quotas for a specific animal system. (2 points)(2) Feeding standard is the most authoritative expression of animal nutrition requirement research applied to animal feeding practice. It reflects the objective requirements of animal survival and production on feed nutrients. It highly summarized the latest progress in nutrition research and production practice, with strong scientific and extensive guidance. (3 points)(3)Due to the differences in feed, environment, breeding conditions, etc., the nutrition requirements in the breeding standards should be appropriately adjusted according to actual conditions. (3 points)Therefore, pay attention to the suitability of the selection of "standards", the flexibility of application standards and the unity of standards and benefits. (2 points)