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本文从以下几个角度介绍。

    3、[安徽第一卷]2024-2025学年安徽省七年级教学质量检测七Ⅶ(5月)地理(湘教版)试题


    2、[安徽第一卷]2024-2025学年安徽省七年级教学质量检测七Ⅶ(5月)化学(湘教版)试题


    C
    At first glance, a dead tree might just look like a lifeless, fallen log. But look closer: beneath the rotting bark(树皮), the wood is full of life. Upon its death, the tree's tightly sealed tube system, previously used to transport nutrients and water, becomes empty and allows some creatures to pass through, according to Matteo Garbelotto, a professor at the University ofCalifornia, Berkeley.
    These empty trunks, still standing upright, are also called snags or wildlife trees. Because of their verticality, they can host a high diversity of species that varies from top to bottom. Fallen trees, often called logs, are also valuable habitats, though for smaller species, Garbelotto says.Both types attract all sorts of life, starting with fungi (真菌) .
    Fungi do much of the hard work of speeding up the decomposition process, softening the hard trunk into something with many small holes. This allows in a whole host of species seeking food and shelter: beetles get in to lay egg, amphibians nestle under the bark, and birds feeding on insects build nests within the trunk itself.
    The collection of wildlife changes over the course of the tree's decay(腐烂), with each new species contributing to and profiting from the process. Logs generally increase opportunities for insects, amphibians, and reptiles and make a good combination with snags, Garbelotto says.
    While some species like bark beetles and woodpeckers strongly prefer dead or rotting wood for nesting, others, including wood-decaying fungi, can only survive in deadwood.
    And it's not just the animals that benefit from decaying trees. They provide natural protection and support for young seedlings to grow. As trees decompose, carbon and nitrogen stores are slowly reabsorbed into the soil, a critical step in nutrient recycling, both for young trees and for the larger ecosystem.


    四、任务型阅读
    阅读下面的材料,然后在表格中完成内容摘要,每空不超过三个单词。
    Tips for a Tidy Desk
    Do you want to keep your desk clean and tidy The following tips can help you.
    Only keep things you really need on your desk.
    Use a bag for any papers to read. Have a penholder for pens and pencils. Besides, you had better have a litter bin near your desk.
    Don’t keep any drinks on your desk.


    4、[安徽第一卷]2024-2025学年安徽省七年级教学质量检测七Ⅶ(5月)语文(湘教版)答案


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    4、[安徽第一卷]2024-2025学年安徽省七年级教学质量检测七Ⅶ(5月)语文(湘教版)答案


    (4)检查是否漏水或堵塞 分液漏斗上口玻璃塞上的凹槽未与漏斗口上的小孔对准(或漏斗内部未与外界大气相通或玻璃塞未打开)
    18.解析:(1)根据结构简式知,乳酸分子中官能团是羧基、羟基;(2)乳酸中醇羟基和羧基都能和Na反应生成氢气,与足量钠的反应方程式为;只有羧基能与少量碳酸钠反应生成二氧化碳,反应的化学方程式:+ +H2O+CO2↑;(3)甲基丙烯酸和甲醇在一定条件下可合成甲基丙烯酸甲酯,即羧基和醇羟基发生酯化反应,该反应条件是浓硫酸、加热;(4)甲基丙烯酸甲酯含有酯基,能在NaOH溶液下发生酯的水解反应,溶液无颜色变化,A不选;甲基丙烯酸甲酯含有碳碳双键,能与酸性KMnO4溶液发生氧化反应生成锰离子,溶液紫红色褪去,B选;甲基丙烯酸甲酯含有碳碳双键,能与溴水发生加成反应,溶液褪色,C选;甲基丙烯酸甲酯含有碳碳双键,能与氢气在镍粉作用下发生加成反应,无颜色变化,D不选;(5)丙烯酸甲酯与甲基丙烯酸甲酯的官能团相同,结构相似,分子组成上相差1个CH2原子团,两者互为同系物;(6)分子式相同结构不同的化合物互为同分异构体,与甲基丙烯酸甲酯互为同分异构体的有CH2===CHCH2CH2COOH、,故选AD;(7)甲基丙烯酸甲酯发生加聚反应合成聚甲基丙烯酸甲酯即PMMA,反应的化学方程式为
    ,反应类型是加聚反应。
    答案:(1)羟基 羧基
    (2) 、
    (3)浓硫酸、加热 (4)BC
    (5)同系物 (6)AD


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