Each American high school have different classes that they teach. My school teaches German, French, Sign language, Spanish, and Aeronautics. But, the basics are English, Math, P.E., History, and Science.

有一位网页的回答出现语法错误。应该是Each American high school [has]，不知该网友是不是以英语为母语的

用word2003可以检测出来

What do students in American high school study about math?

Do they study functions?
Do they study arithmetic/geometric sequence?
Do they study trigonometric functions?
Do they study to prove something about geometry?

http://answers.yahoo.com/question/index?qid=20130606044637AAQWHIh

—— The question I asked just now

回复：6楼

This is my second question asked on Yahoo.

有关等差数列（arithmetic sequence）的提问：

http://answers.yahoo.com/search/search_result?scope=all&category=0&fltr=_en&question_status=all&answer_count=any&date_submitted=all&crumb=klDlYT%2FCX8%2F&p=arithmetic+sequence&orderby=rank&filter_search=%3CSPAN%3E%3CSPAN%3E%3CSPAN%3E%3CSPAN%3EApply%3C%2FSPAN%3E%3C%2FSPAN%3E%3C%2FSPAN%3E%3C%2FSPAN%3E&clear_search=%3CSPAN%3E%3CSPAN%3E%3CSPAN%3E%3CSPAN%3EClear%3C%2FSPAN%3E%3C%2FSPAN%3E%3C%2FSPAN%3E%3C%2FSPAN%3E&filter_search=true#add-saved-search