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试题答案

本文从以下几个角度介绍。

    1、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]数学试题


    1、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]生物试题


    Tiananmen Square and the Forbidden City.
    For the one-day tour, I recommend you explore the Central Axis by bike. Cycling
    allows you to see more sights at your own pace. It’s also a fantastic way to connect
    with the local culture as you ride through the dynamic streets. I believe you’ll be
    impressed by the sight of traditional architecture coexisting with contemporary life.
    Any specific landmarks or activities that you’re particularly looking forward to
    experiencing Feel free to tell me! (131)


    James nodded with determination. Emily held Lily's hand tightly. Her fear was replaced by a little hope.
    The bear was still smelling the air. Its big body blocked their way. But Lily knew they must act quickly.
    She gestured for them to move slowly, keeping close to the ground. Their breaths were shallow and quiet.
    The stream was only a few meters away. The soft sound of the water was very different from the nervous
    feeling in the air. As they moved closer, the bear roared again. But this time, it seemed farther away, as if
    it had lost interest. Lily's heart was beating fast, but she made herself stay calm. She just focused on the
    stream in front.


    2、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]化学试题


    6、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]历史试题


    5、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]生物试题


    2、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]政治试题


    1、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]生物学试题


    2、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]生物学试题


    C．两个实验中发生的反应都是分解反应
    D．两个实验均可证明水的组成
    7．硝酸银（AgNO3）见光或受热易分解。硝酸银分解时，不可能产生的物质是（ ）
    A．Ag B．NO2 C．O2 D．SO2
    8．下列过程中有化学变化发生的是（ ）
    A．探究铁生锈的条件
    B．自制汽水


    步骤二：制备硫代硫酸钠晶体
    实验室制备装置如图2所示。
    称取提纯好的硫化钠22.4 g，再称取16.15 g碳酸钠一起加入三颈烧瓶，加水溶解，圆底烧瓶中产生的二氧化硫气体通入三颈烧瓶，发生反应：①2Na2S+3SO2===2Na2SO3+3S↓、②……、③Na2SO3+S===Na2S2O3，有大量的浅黄色的硫逐渐析出，继续通入二氧化硫，反应进行30~40 min时溶液的pH 接近7，停止通入二氧化硫，过滤，将所得硫代硫酸钠溶液转移到蒸发皿中加热，浓缩到刚有晶体析出时停止加热，冷却析出晶体，抽滤得到Na2S2O3·5H2O晶体。
    请回答下列问题：
    (1)图1中甲仪器的名称是　　　　；重结晶法提纯硫化钠选用的试剂最好是　　　　 (填字母)。
    A.纯水
    B.无水酒精


    3、2025届山东省高三第六次学业水平联合检测同类训练题[齐鲁名校大联考]化学答案