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 4-2 화석을 찾아서 과학평가 http://www.gnedu.net/cdrom/%C3%CA%B5%EE/%BD%BD%BB%FD/4%BE%E7%BB%EA/index.html 과학 http://seis.scienceall.com/book_file/ke15/ke015-index.htm |
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4-2 화석을 찾아서 과학평가 http://www.gnedu.net/cdrom/%C3%CA%B5%EE/%BD%BD%BB%FD/4%BE%E7%BB%EA/index.html 과학 http://seis.scienceall.com/book_file/ke15/ke015-index.htm |
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