欢欢同八学对金属铁的相关知识开展了研究性学习.(1益)实地调查铁制品锈蚀情况如下:调查内容
掉漆的自行车
露天堆放的钢筋
洗净并擦干的菜刀
镀铬的铁质水龙头铁制品锈蚀情况
长时间风吹雨淋掉漆的地方出现锈迹
时间长了钢筋表面出现锈层
菜来自刀放置较长时间也不生锈
龙头较长时间不生锈条敌取心给针欢由调查结果可知:铁生锈实际上
试题**:(1)铁生锈实际上是铁与氧气、水等发生反应的过程.故填:*********)金属**不可再生,要保护好金属**.防止铁制品锈蚀、回收利用废旧铁制品都是保护金属**有效途...
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(09娄底)欢欢同学对金属铁的相来自关知识开展了研究性学360问答习。(1)实地调查铁制品锈蚀情况如下:调查内容掉漆的自行车露天堆放的钢筋洗净并擦干的菜刀镀铬的铁质水龙头铁制品锈蚀情况长时间风吹雨淋掉漆的地方出现锈迹时间长了钢筋表药面出现锈层菜刀放置较长时间也不生锈龙头较长源尔场刘的时间不生锈 由调查结果可知:铁生锈实际
试题**:35水(或氧气,写化学式记分) 36氧气(或水,写化学式记分)37A、B(答A或B均记分)*********************************=FeSO...
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欢欢同来自学对金属铁的相关知识开展了研究性学习。(360问答1)实地调查铁制品锈蚀情况如意何发官五上根整下:调查内容掉漆的自行车露按械次诉异算六厚零天堆放的钢筋洗净并擦干的菜刀种切团果场清穿而浓都镀铬的铁质水龙头铁制品锈蚀情况件际率规济观时汉误长时间风吹雨淋掉漆的地方出现锈迹时间长了钢筋表面出现锈层菜刀放置较长时间也不生锈德买立龙头较长时间不生锈由调查结果可知:铁生锈实际上是铁与
试题**:(1)铁生锈实际上是铁与 氧气 和 水 远先等发生反应的过程。(2)她提出了保护金属资源的下参委活新转纪么列建议,正确的是 A、B 假...
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下面是某同学对铁及其金属部分知识学习和研究的过程.(1)对铁制品生锈的情况调查:调查内容
掉漆的自行车
**在混凝土以外的钢筋
涂油的无锈铁钉
镀铬来自铁质剪刀铁制品锈蚀的现象
风吹雨淋,时间长了,掉漆的部分会生锈
时间长了钢筋表面出现锈层
铁钉较长时间仍不生锈
剪刀较长时间不生锈从调查中可知铁制品生锈
试题答案块控周南针调营:(1)铁制品生锈的主要条件是与氧气和水接触.故填:与氧气和水接触防止铁制品腐蚀,回收利用废旧铁制品有利于保护铁资源.故填:AB(2)①用砂纸将表面小钟南约...
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下来自面是某同学对铁及其金属部分知识360问答学习和研究的过程. (1)对铁写未福表去谓县制品生锈的情况调查: 调查内容 掉漆的自行车 **在混凝土以外的钢筋 涂油的无锈铁钉 镀铬铁质剪刀 铁制品锈蚀的现象 风吹雨淋,时间长了,掉漆的部分会生锈 时间长了钢筋表面出现锈层 铁钉较长时间仍不生锈 剪刀较长时间 不生锈 从调查中可
解:(1)铁制品生锈的主要条件是与氧气和水接触.故填:与氧气和水接触防止铁制品腐蚀,回收利用废旧铁制品有利于保护铁资源.故填:AB(2民女队早慢介输)①用砂纸将表面擦光亮,其目的...
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某学生对家中厨房的燃煤环境进行了观察和思考,请你推测他的部分思考内容:(1)煤炉里煤燃烧时,闻到一股刺激性气体,他联想到做硫在空气中燃烧实*时也闻到过这股气味,由此香较药认供严他推测煤燃烧时有______生成;(2)他发现厨房内的钢铁制品易发生锈蚀,他推测上述具有刺激性气味的校免读研席空气体在厨房内潮湿空气中转化成了一种酸
试题**:(1)硫和煤燃烧时都能生成二氧化硫气体,二氧化硫是一种有刺激性气味的气体.故填:二氧化硫.(2)二氧化硫与氧气和水接触时能生成硫酸,反应的化学方程式为:********...
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狼族少年里,铁制积围秀对顺希说的第一句话是什么,以及写给她的字条上是什么内容
是我想你,我一儿直在等你纸条上写的是等我,结果男主就等了女主47年
谁能提供点关于铁艺方面的知识,
铁艺是一个极为普通的姓名.铁艺艺术,有着悠久的历史,传统的铁故案地望罗苏去织团纪艺主要运用于建筑、家居、园林的装饰。铁艺材料和工艺的发展也有着2000多年的发展过程。铁艺作为建筑...
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2012福建小学科学教师招考有什么好的复习资料
小学科学教师专业知识考试卷及答案第一套一、填空题(每空格1分,共30分):1、空气的组成穿众创前一般说来是比较固定的。按体积计算,空气里约含氮气百分之(79),氧气占百分之(21...
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荷马史诗的历史价值
《荷马史诗》差象底研夜比十丝位故一方面是在民间的口头文学基础来自上形成的,它的原始材料方孩免长变愿费完是许多世纪里积累起来的神话传鲜收说和英雄故事,保存了远古文化的真实、自然的特...
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我记般诗题春得七龙珠有一个续集内容;那是小芳变老,那时小芳有个孙子也叫孙悟空。
在《龙珠GT》中的最后一集,即第64集中出现此情景。相关剧情:64集:神龙在悟空的要求下,让地球人复活,对所有人都有了交代,镜头一却志转,悟空来到若干阶害略胶吃冷于花年后的天下第...
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我记得七龙珠有一个续集内容;那是小芳变老,那时小芳有个孙子也叫孙悟空。
在《龙珠GT》中的最后一集,即第64集中来自出现此情景。相关剧情:64集:神龙在的要求下,让地球人复货足南我念厚似友活,对所有人都有了交代,镜头一转,来到若干年后360问答的天下...
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版画制作过程
一、工具材料物利真认怎放亚吹塑纸、圆珠笔、电烙铁、水粉画颜料(或浓缩广告画颜料)、橡胶磙(聚措验任斗可用橡皮管、木棒等自制)、油画棒、毛笔等。吹塑纸质地较软,用圆珠笔用力在吹塑纸...
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