Aggrief
发表于 2025-3-21 16:05:59
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欢呼
发表于 2025-3-21 22:37:04
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你不公正
发表于 2025-3-22 03:49:53
Absolute Population Estimates using Marking Techniques,may be estimated (Le Cren, 1965). This was based on the principle that if a proportion of the population was marked in some way, returned to the original population and then, after complete mixing, a second sample was taken, the number of marked individuals in the second sample would have the same r
candle
发表于 2025-3-22 05:40:52
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慢跑鞋
发表于 2025-3-22 10:01:17
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CRUE
发表于 2025-3-22 13:27:29
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CRUE
发表于 2025-3-22 18:28:06
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噱头
发表于 2025-3-23 01:05:24
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反话
发表于 2025-3-23 01:42:36
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maudtin
发表于 2025-3-23 06:44:32
The Construction, Description and Analysis of Age-specific Life-tables,al ecologists, such as Richards (1940), had expressed their results showing the successive reductions in the population of an insect throughout a single generation, Deevey (1947) was really the first to focus attention on the importance of this approach. Life-tables have long been used by actuaries