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出现繁荣于距今三亿年前的石炭纪。是形成煤炭的原始植物之一。现今地球上存活一万二千种,中国有2600种。
-barton-
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04/05/2014 postreply
17:23:33
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#2 清楚, #1, #3 糊了.
-嘉崚子-
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04/05/2014 postreply
22:53:46
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手艺太差!
-barton-
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04/05/2014 postreply
23:57:30
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不太哦懂这个,几亿年生命史的活化石应当值老钱了吧?
-林间曲径金秋时-
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04/06/2014 postreply
18:19:25
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