问答题 7. (非英语类学生必做)It is interesting to note that in countries where the national diet contains large quantities of unrefined flour and vegetables, certain diseases are comparatively rare. (Passage Four)

【正确答案】 很有趣的一点是，在那些饮食中包含大量的非精制的面粉和蔬菜的国家中，某些疾病的发病率相对较小。

【答案解析】 It is interesting to note that...注意到什么很有趣：where the national diet contains large quantities of unrefined flour and vegetables做地点状语从句；comparatively rare相对稀少。