New records for hermatypic corals (Anthozoa: Scleractinia) in the Gulf of California,Mexico, with an historical and biogeographical discussion

This paper reports range extensions for seven hermatypic coral species in the Gulf of California. An analysis of the distribution and fossil record of the 12 hermatypic species of the Gulf shows that the coral communities of the Gulf are the oldest ones in the eastern Pacific. Two species have been recorded in the Gulf (or nearby) since the Pliocene and several other species since the Pleistocene. The uninterrupted fossil record falsifies the hypothesis of a total extinction of reef corals in the eastern Pacific during the Pleistocene. The fossil evidence and temperature calculations support the conjecture that the Gulf of California was a refuge zone for corals and other warm-water biotas during the same epoch. Also it is suggested that some species of the genera Porites may have an Atlantic origin, contrary to the accepted idea of an exclusive Indo-Pacific origin of the eastern Pacific coral fauna.     

新疆龙胆科假龙胆属一新纪录种——紫红假龙胆

笔者在整理和鉴定采自阿尔金山国家级自然保护区的植物标本时发现,该地区产的龙胆科假龙胆属一新疆新纪录种,即紫红假龙胆Gentianella arenaria(Maxim.)T.N.He。该种为新疆迄今未曾记录过的新种,现予以报道。     

等差数列中的完全方幂

设n、m、d是适合n >1以及gcd(m ,d) =1的正整数。本文证明了 :当n =2时 ,存在无限多组 (m ,d) ,可使m、m +d和m +2d都是n次方幂 ;当n >2时 ,m、m +d和m +2d中至多有 2个n次方幂。     

DBF数据库文件损坏后的恢复方法

将对计算机因主机突然断电或死机造成损坏的一种 FOXPRO数据库文件进行如何恢复作介绍 ,并给出了一个实例恢复程序     

谈人事档案在人才引进中的作用

阐述了人事档案在人才引进中所发挥的重要作用，提出了进一步发挥人事档案在人才引进中作用的几点建议。     

在AutoCAD中插入数据库记录

本文介绍了利用AutoCAD ActiveX自动化将各类数据库记录以表格形式插入到AutoCAD图形文件中的方法.     

河南蝶类3新记录种

记述河南蝶类新记录３种：黎桑瞿眼蝶Ｙｐｔｈｉｍａ ｌｉｓａｎｄｒａ，幺纹稻弄蝶Ｐａｒｎａｒａ ｎａｓｏ，南亚谷弄蝶Ｐｅｌｏｐｉｄａｓ ａｇｎａ。     

谈谈年鉴的CNMARC著录

年鉴是具有连续出版物的特征,又具有参考工具书性质的特殊文献载体,年鉴的CNMARC著录中有若干字段需要加以注意。     

"其文直,其事核"——《史记》叙事特点研究

重点论述《史记》“其文直,其事核”的实录性叙事特点。论文从西汉末年至近代人们对《史记》实录性叙事特点的认识过程开始介绍,具体分析了《史记》叙事实录性特点的三个具体表现:“考而后信”;实事求是,秉笔直书;简笔交代,不枝不蔓。在此基础上,进一步对《史记》篇章中在真实性上受到人们质疑、人们认为有违于叙事实录性的情节进行了分类,并依类展开解读,指出这些情节都没有违背叙事实录性的原则,叙事的内容和过程都是“文直,事核”的,也体现出叙事的实录性特点。