一大群
发表于 2025-3-25 06:01:55
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使服水土
发表于 2025-3-25 08:00:08
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inhumane
发表于 2025-3-25 13:33:23
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Paleontology
发表于 2025-3-25 17:16:33
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artifice
发表于 2025-3-25 20:48:04
Nucleophilic Reactions of Carboxylic Acids and their Derivatives,nd amides. The formal resemblance in structure of these compounds and the aldehydes and ketones might lead us to expect them to exhibit the same kind of chemical reactivity. In fact, although they are often attacked by the same nucleophiles which react with aldehydes and ketones, the presence of ano
nitroglycerin
发表于 2025-3-26 03:42:35
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山崩
发表于 2025-3-26 05:21:17
kilometers and over the course of many millennia has produced a region of fertile alluvial soils and constant flows of energy. Today about a fourth of the Delta is under rice cultivation, making this area one of the premier rice granaries in the world. .The Delta has always proven a difficult env
visual-cortex
发表于 2025-3-26 08:42:57
Charles Wentnary and international.Includes a large number of scholars f.The Mekong Delta of Vietnam is one of the most productive agricultural areas in the world. The Mekong River fans out over an area of about 40,000 sq kilometers and over the course of many millennia has produced a region of fertile alluvia
motivate
发表于 2025-3-26 13:31:20
Charles Wentnary and international.Includes a large number of scholars f.The Mekong Delta of Vietnam is one of the most productive agricultural areas in the world. The Mekong River fans out over an area of about 40,000 sq kilometers and over the course of many millennia has produced a region of fertile alluvia
neolith
发表于 2025-3-26 18:52:20
Charles Wentnary and international.Includes a large number of scholars f.The Mekong Delta of Vietnam is one of the most productive agricultural areas in the world. The Mekong River fans out over an area of about 40,000 sq kilometers and over the course of many millennia has produced a region of fertile alluvia