愚蠢地活 发表于 2025-3-21 16:42:47

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有法律效应 发表于 2025-3-21 23:22:48

https://doi.org/10.1007/978-3-658-11994-2Assesment; Education; Institutions; Scale Longitudial Surveys; School; Students; learning and instruction

转换 发表于 2025-3-22 03:45:29

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相同 发表于 2025-3-22 06:56:22

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Functional 发表于 2025-3-22 09:15:16

ates the significant observations that can be made with a smThesmallrefractingtelescopewithitssimpledirectdesignandconstructionand permanently aligned optics is the time tested standard for personal use. Easily portable, it can be taken out of the house and set up at a moment’s notice. Or, it can be

野蛮 发表于 2025-3-22 14:00:32

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Vulnerary 发表于 2025-3-22 18:00:44

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摘要记录 发表于 2025-3-23 01:01:08

Frank J. Infurna,Denis Gerstorf,Nilam Ram,Jutta Heckhausen portable, it can be taken out of the house and set up at a moment’s notice. Or, it can be packed conveniently into a small car for traveling to a dark observing site. With moderate care and minimal maintenance, the telescope and mount canlastforgenerations. These instruments provide sharp, crisp hi

和平主义 发表于 2025-3-23 02:46:49

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路标 发表于 2025-3-23 07:39:04

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查看完整版本: Titlebook: Methodological Issues of Longitudinal Surveys; The Example of the N Hans-Peter Blossfeld,Jutta von Maurice,Jan Skopek Book 2016 Springer Fa