HAND
发表于 2025-3-21 18:22:40
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包租车船
发表于 2025-3-21 23:36:04
Configurationis the mirror image of the other. Carbon atoms arranged in this way are designated as asymmetric. The concept of asymmetry can, of course, be applied to all compounds with four substituents arranged tetrahedrally around a central atom (e.g., Si, P., N.), as well as to central atoms with more than fo
NOTCH
发表于 2025-3-22 03:14:25
Supermolecular Structuresthe touch and appear turbid. Films of the same material are transparent, but not as clear as films of poly(ethylene terephthalate). Poly(styrene) beakers are brittle, but beakers made from polyamides are not. Some products, such as leather, for example, are pliable, others, such as cured phenolic re
Offstage
发表于 2025-3-22 05:27:04
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lobster
发表于 2025-3-22 10:43:53
Transport Phenomena, while the conduction of heat is the transport of thermal energy. The transport of matter can occur by diffusion, by sedimentation in a centrifugal field, by electrophoresis in an electric field, etc.
Antarctic
发表于 2025-3-22 16:48:02
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PLUMP
发表于 2025-3-22 20:56:50
Determination of Molecular Weight and Molecular-Weight Distributioned directly from the measured quantities; a knowledge of the physical and chemical structure of the molecules is not required. Absolute methods include colligative methods (membrane osmometry, ebulliometry, cryoscopy, and vapor-phase osmometry), light scattering, and equilibrium sedimentation. Some
手势
发表于 2025-3-23 00:03:34
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不透明
发表于 2025-3-23 03:50:10
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诽谤
发表于 2025-3-23 05:48:00
Compounding and Processing of Plasticstic material of a macromolecular substance, it must be equipped with antioxidants, fillers, lubricants, etc. Such protective additives are intended to improve the mechanical, electrical, and/or chemical properties of the plastic, simplify its processing, and give it a suitable, acceptable appearance