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2016年雅思考试精选阅读训练题(五)免费下载，
hing and varnishing fossils — all standard conservation treatments used by many fossil hunters and museum curators alike — vastly reduces the chances of recovering ancient DNA.
2. Instead, excavators should be handling at least some of their bounty with gloves, and freezing samples as
2016年雅思考试精选阅读训练题(五)
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