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下面是某兴趣小组同学进行实验探究时的实验装置图请认真观察结合所学知识作答1 甲乙一组实验探究的问题是 其中图中的 起对照作用 2 Template






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sketch 2639 Marilyn by sketchmaster
sketch 5192
sketch 4269 dragón
sketch 4984 Zombie by London Waterlilly
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sketch 1452 donara
sketch 2919 Winnie the Pooh by Greet Kros-Lolkus

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sketch 2959 manga girl blue hair
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sketch 1119 crimson
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sketch 3321 Baby Mirella Flowers
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tomski下面是某兴趣小组同学进行实验探究时的实验装置图请认真观察结合所学知识作答1 甲乙一组实验探究的问题是 其中图中的 coloring
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某学习小组的同学对实验室制取二氧化碳及二氧化碳的性质进行如下两个方面的探究。Ⅰ二氧化碳的制取第一小组用如图所示的装置制取二氧化碳并测定生成 sketch template
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27．学校化学兴趣小组的同学对一瓶溶液进行分析初步确定它是含有同种阴离子的MN的混合溶液继续分析的步骤如下 请根据上述实验过程及现象 sketch template
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下面是某兴趣小组同学进行实验探究时的实验装置图请认真观察结合所学知识作答1 甲乙一组实验探究的问题是 其中图中的 起对照作用 2 sketch template
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下面所示是某校化学兴趣小组的同学探究物质燃烧条件的实验过程 实验1在酒精灯上点燃木条和玻璃棒 实验2分别点燃两支小蜡烛将其中一支蜡烛 sketch template
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某校化学兴趣小组的同学在探究属的化学性质时现铜与稀硫酸在常温或加热的条件下均不反应．那么铜与浓硫酸能否生反应他们就铜与浓硫酸是否 sketch template
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某化学兴趣小组为探究SO2的性质，按下图所示装置进行实验。 请回答下列问题： 1装置A中盛放浓硫酸和亚硫酸钠的仪器名称分别是 、 ； 2 sketch template
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14．学习植物生理作用的知识后某兴趣小组设计如下实验进行验证请分析回答取盆栽牵牛花植株放在暗处一昼夜后将植株枝条上长势大小相同的三 sketch template
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某化学兴趣小组的同学们按照下面的实验方法制备氢氧化铁胶体首先取量蒸馏水于洁净的烧杯中用酒精灯加热至沸腾烧杯中逐滴滴加饱和的FeCl3 sketch template
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某兴趣小组的同学对水的组成进行了实验探究。【提出问题水是由什么组成的【查阅资料通过电解水和点燃氢气证明燃烧产物的方法均可证明水的组成 sketch template
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某兴趣小组同学按照下图实验装置进行实验请回答相关问题1你认为设计该实验是为了测定空气中氧气的含量2实验过程中下列操作不妥的是 sketch template
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碳酸氢钠常用于食品和医药工业．某化学兴趣小组的同学对碳酸氢钠的热稳定性进行探究．查阅资料1碳酸氢钠受热容易分解生成水二氧化碳气体和一 sketch template
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某兴趣小组同学以“探究CO2与NaOH溶液的反应”为主题开展项目式学习，兴趣小组同学将CO2通入NaOH溶液中，现无明显现象，为了证明该反应 sketch template
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下面是某兴趣小组同学进行实验探究时的实验装置图请认真观察结合所学知识作答1 甲乙一组实验探究的问题是 其中图中的 起对照作用 2 sketch template
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下面是某研究性学习小组对氢氧化钠有关性质进行探究的过程请回答下列问题．1欲配制500g溶质质量分数为10%的氢氧化钠溶液．需要水 Ml sketch template
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百度教育 sketch template
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如图某兴趣小组同学做了以下实验．请回答有关 问题．1该实验的目的是探究分子的运动2A烧杯中的现象是酚酞试液由无色变成红色3为了 sketch template
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下面是某兴趣小组同学进行实验探究时的实验装置图请认真观察结合所学知识作答1 甲乙一组实验探究的问题是 其中图中的 起对照作用 2 sketch template
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下面是某生物兴趣小组的同学所做的“馒头在口腔中的变化 探究实验实验过程1号试管加入馒头碎和2mL唾液并充分搅拌2号试管加入馒头 sketch template
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某学校化学兴趣小组同学在学习了制取氧气这一节内容后现在实验室里用5%H2O2溶液加热制O2用带火星的木条检验木条很难复燃．同学们经过 sketch template
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题目某兴趣小组对物质的性质和成分进行相关探究 1常见属活动性顺序如下填写相应的元素符号 属活动性由强逐渐减弱 某同学用硫酸铜 sketch template
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某化学兴趣小组在做完石灰石和稀盐酸制取二氧化碳的实验后对反应后剩余溶液的溶质成分产生了兴趣他们进行了以下实验探究．提出猜想实验室制取 sketch template
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1某实验小组的同学在“绿叶在光下制造有机物 的实验中用银边天竺作为实验材料完成了图1所示的实验步骤请你根据以下实验步骤回答下列 sketch template
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某化学兴趣小组在做完石灰石和稀盐酸制取二氧化碳的实验后对反应后剩余溶液的溶质成分产生了兴趣他们进行了以下实验探究．提出猜想实验室制取 sketch template
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33．某生物兴趣小组的同学进行探究萘乙酸NAA促进插条生根最适浓度的预实验结果如图所示在预实验的基础上他们又进一步设计如下实验探究 sketch template
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水是生之源某化学兴趣小组对水进行了探究．1图为进行电解水实验的装置图据此回答C试管中收集到的气体是氧气图中B端为电源的负极该 sketch template
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某化学兴趣小组的同学利用如图所示实验装置进行实验请按要求填空1利用B装置可制取的气体有 2ACE相连后的装置可用于制取 sketch template
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在研究“铁生锈的条件 的实验中某兴趣小组对实验进行了创新设计请把实验补充完整．实验目的铁生锈条件的探究．实验内容取3段光亮无锈的细 sketch template
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某兴趣小组同学设计探究光合作用需要某种原料的实验实验前将天竺放在暗处一昼夜按下图示装置安放好光照2 3小时分别取下叶片A和B浸入 sketch template
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某兴趣小组在实验室中模拟炼铁化学原理的实验对固体产物成分等进行探究 设计实验用一氧化碳还原纯净的氧化铁粉末实验装置如下图 进行 sketch template