三、試述集團養猪的優點與缺點。（25 分）

一、國際糧農組織（FAO）對「糧食安全」的看法「Food Security exists when all people, at all times, have physical, social and economic access to sufficient, safe and nutritious food that meets their dietary needs and food preferences for an active and healthy life. （FAO, 2009）」廣為大家所引用，試依此看法就「糧食安全」與「糧食自給率」（Food Self-sufficient Rate）間的關係及其差異加以論述。（25 分）