单元重点难点单元重点【语言知识】词汇：描述人物特征的形容词（tall/short,outgoing/shy,hard-working/lazy,funny/serious等）及其反义词；比较相关词汇（than,more,less,as...as,differentfrom等）；个人成长领域词汇（physical,mental,study,sports）；数据描述词汇（population,area,average等）语法：形容词和副词的比较级（-er,more...than）和原级（as...as）结构；不规则比较级（better,worse,more,