configuration 发表于 2025-3-23 13:28:31
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Polymers and Elastomers,en with increasing temperature and return to their original hardness when cooled. Most are meltable, e.g. nylon is extruded into fibers or filaments from the molten state. The . harden when heated and retain hardness when cooled. They set into permanent shapes by catalysis or when heated under press钢笔记下惩罚 发表于 2025-3-23 23:04:38
Rocks and Meteorites,f one or more minerals and/or glass. From a wide geological point of view, rocks can be either solid (e.g., granite, limestone, rock salt, and ice), or fluid (e.g. sand and volcanic ashes), or liquid (bitumen and oil), or gaseous (natural gas and hydrothermal fluids). The important discipline of EarVEIL 发表于 2025-3-24 02:40:15
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Building and Construction Materials, product, after grinding and mixing with clear water, would set to a hard cement. This new type of cement was stronger than the cements in previous use at that time, such as the pozzolan cement. Another important advantage was also noticed by the first users, namely that it sets under water and henc感情脆弱 发表于 2025-3-24 13:22:32
personal (the reflexive work of the contributing authors).“In this era, when ‘commonsense’ in educational discourse is so deeply framed by neoliberalism, we must better understand both the uniquely situated and the insidiously interconnected nature of so-called reforms. Thank you to Keith M. Sturge迁移 发表于 2025-3-24 17:51:11
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http://reply.papertrans.cn/63/6258/625776/625776_19.png尖酸一点 发表于 2025-3-25 02:33:29
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