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孙学政 《广东海洋大学学报》2007,27(2):109-112
在概述档案本质属性研究现状的基础上,分析了档案本质属性研究存在的问题,并提出档案的本质属性是作为历史记录保存的价值性。 相似文献
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“创33个月以来新高”,“创45个月以来新高”,无论是今年9月份10个典型城市土地出让金收入还是今年11月份一线城市土地成交均价,都在不断飙升,土地盛宴貌似已不足以形容一线城市土地市场的高涨情绪,或许“饕餮盛宴”更为贴切? 相似文献
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记者从2月3日召开的河南省煤田地质局2010年工作会上获悉,该局去年在省内外煤炭资源勘查工作中成绩显著,共提交煤炭资源储量57.77亿吨,同时在其他矿产勘查方面也取得了喜人成果。以丰硕的地勘成果和刷新历史纪录的经济发展为2009年画上了圆满的句号。 相似文献
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Some historical records, which have held since the beginning of modern solar activity cycles, are being broken by the present Sun: cycle 23 records the longest cycle length and fall time; latitudes of high-latitude sunspots belonging to a new cycle around the minimum time of the cycle are statistically the lowest at present, compared with those of other cycles; there are only one or no sunspots in a month appearing at high latitudes for 58 months, which is the first time that such a long duration has been observed. The solar dynamo is believed to be slowing down due to: (1) the minimum smoothed monthly mean sunspot number is the smallest since cycle 16 onwards, and even probably among all modern solar cycles; and (2) once the time interval between the first observations of two neighboring sunspot groups is larger than 14 d, it should be approximately regarded as an observation of no sunspots on the visible solar disk, called a spotless event. Spotless events occur with the highest frequency around the minimum time of cycle 24, and the longest spotless event also appears around the minimum time for observations of the Sun since cycle 16. Cycle 24 is expected to have the lowest level of sunspot activity from cycle 16 onwards and even probably for all of the modern solar cycles. 相似文献
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