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1. Stackoverflow.comstackoverflow.com

网站简介:StackOverflow:面向编程人员问答网是全球IT界最受欢迎的技术问答网站之一,它将一个乏味无趣的技术类问答网站办得如同网游一样令人着迷。

2. Answers.yahoo.comanswers.yahoo.com

网站简介:Ask questions and get answers from other people in the community.

3. Justanswer.comjustanswer.com

网站简介:Lawyers, Doctors, Mechanics, Veterinarians, Accountants and other Experts answer user-submitted questions for an agreed upon fee.

4. Experts-exchange.comexperts-exchange.com

网站简介:Premium content subscription site where users collaborate with each other to solve their technology problems.

5. Wisegeek.comwisegeek.com

网站简介:Clear answers for common questions.

6. Jiskha.comjiskha.com

网站简介:Many experts answer questions and provide feedback to homework problems.

7. Blurtit.comblurtit.com

网站简介:Free self moderated directory.

8. Allexperts.comallexperts.com

网站简介:A directory of subjects with volunteer experts to answer posted questions.

9. Wiki.answers.comwiki.answers.com

网站简介:Questions and answers in a shared, wiki format.

10. Liveperson.comliveperson.com

网站简介:Provides experts via chat, video, or email.

11. Able2know.orgable2know.org

网站简介:Ask an expert or share answers. Features questions and discussions on diverse topics.

12. Theanswerbank.co.uktheanswerbank.co.uk

网站简介:Post questions and answers or discuss topics of interest.

13. Askmehelpdesk.comaskmehelpdesk.com

网站简介:Become an expert or ask an advisor about anything from financial advice to technical support at this question-and-answer community.

14. Physlink.com/Education/AskExperts/Index.cfm

网站简介:Ask questions and check out the archives, organized by topic.

15. Curious.astro.cornell.educurious.astro.cornell.edu

网站简介:Browse archives of previous questions and answers, or submit a question to be answered by astronomers at Cornell University.

16. Bitwine.combitwine.com

网站简介:Offers expert advice on topics including spirituality, nutrition and travel.

17. Mathforum.org/dr.math/

网站简介:Ask Dr. Math a question or browse the archive of previous questions and answers.

18. Quomon.comquomon.com

网站简介:A knowledge sharing and collaboration website for IT and Graphic Design professionals.

19. Tutor-homework.comtutor-homework.com

网站简介:Tutor and homework help in math, chemistry, physics, business, finance, statistics, & engineering. All grade levels. Homework help through email or tutoring through Chat.

20. Webanswers.comwebanswers.com

网站简介:Provides answers to input questions in a number of areas including games, fitness, and education.n.

21. Factcheck.org/askfactcheck/

网站简介:Ask political questions and selected questions will be researched and answered.

22. Aerospaceweb.org/question/

网站简介:Explains design, technology, aerodynamics, history, space travel, and other topics related to aerospace engineering.

23. Mathcentral.uregina.ca/QandQ/

网站简介:Email math questions to a panel of consultants.

24. Maybenow.commaybenow.com

网站简介:Ask questions for answers and chat from other community members.

25. Loc.gov/rr/askalib/

网站简介:An online reference service (via email) from the Library of Congress. Live chat available for certain subject areas.