各位大侠：我的朋友在就读美国大学本科，
学习美国社会历史，
但是遇到许多问题，不知道在那个论坛可以登载他的问题以便寻求帮助，
诸如
1. how many people serve in US military as enlisted personnel
how many of this are white?
2. what is the percent of 2008 to 2009 california budget revenue comes from personal income tax??
how much % ?? How much of that in dollars??
3. what is the number of candidates for president are running for the nominee of more than 1 party?? name one:
4. what is the total approved gross expenditure in Santa Clara county fiscal 2008 budget for public safety and justic??
那位好心大侠能否介绍几个有用的网站论坛？？
谢谢