【简答题】

    In many countries around world，more and more people
live in cities．Cities shares many characteristics，but
are also difference from country to country．
    Mexico’s cities are modern and have traditional In．dian
and Spanish influences．The most important building
are aroun d a central square,which also serves a place
to meet with friends,There are outdoor marketplaces，
where people can find almost nothing they needed．
On Sundays,parks are a popular place to family outings．
Many people move to Mexico City from rural areas．It is
a 1ot of excitement，but also lots of traffic and air pollution．