120．The Whigs were strongest in the towns，cities，and thoserural areas that were fully integrated into the market economy，whereas Democrats dominated areasof semisubsistence farming that were more isolated and languishing economically．

(whereas结构)

在城镇和那些与市场经济完全接轨的农村地区辉格党的势力最强；而民主党控制经济上孤立而薄弱的贫穷农业地区。

分句1：The Whigs were strongest in thetowns，cities

分句2：and those rural areas that werefully integrated into the market economy

分句3：whereas Democrats dominated areasof semisubsistence farming

分句4：were more isolated and languishingeconomically

1、2和3、4并列

1和2并列

3和4嵌套