端午节后,小丽带着快乐的心情返回学校.当她来到实验室时,意外地发现实验桌上有瓶敞口放置已久的NaOH溶液,由此激发了她的探究**.(1)这瓶N来自aOH溶液一定变质了,其变质程呀担切胞服细育绝度如何?小丽的猜想:NaOH溶液部分变质.你的新猜想:______.小丽设计如下实验360问答来验证自己的猜想,请根据表中态愿艺甲内容填写小丽实验
试题答案:(1)敞口放置已久的NaOH溶液,可推测可能部分变质或者是全部变质;根据氢氧化钠部分变质说明既有碳酸钠,也有氢氧化钠,所以取少量NaOH溶液样品于试管中,先滴加足量的C...
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******主演过一部恐怖片 我不知道名字? 不是暮光之城 , 内容大概是 他和一他的家人一起住近一个新的房子 可来自是每次都会有个人影360问答出现 然后那个女的吃的苹果突然变质了 冰箱里的所有东西都发霉了
是“暮色”
下列知识整理的内容不完全正确的一组是( )A.食品保鲜的办法填充氮气--防止变质放入生石灰--防止受潮放入细铁粉--防止受稳关*民说散基曲潮和变质B.灭火实例与原理油锅着火时用锅盖盖灭--隔绝空气住宅失火时用水灭火--降低着火点扑灭森林火灾时设置隔离带--隔离可燃物C.日常物质的区别硬水和软水--包陆增手一厂案长现加肥皂水并搅拌羊
试题**:A、填充氮气--防止变质(利用氮气的稳定性)、放入生石灰--防止受潮(利血点弱用生石灰的吸水性)、放入细铁粉--防止受潮和变质(铁粉和氧气以及水反应成铁锈).全部正确;...
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埃及金字塔阅读答沙总过案
11.给下面加着重号的字注音。(2分)①堆砌()②混()凝土12.文章素①段中加线的句子有用词不当的语病,请找出来并修改。(2分)13.根据文章内容,请你360问答用简明的语言解...
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破解埃及来自金字塔之谜,阅读理360问答解?
11.给下面加着重号的字注音。(2分)①堆砌()②混()凝土12.文章素①段中加线的重耐德句子有用词不当的语病,请找出来并修改。(2分)13.根困关队纪孙前据文章内容,请你用简明...
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金字塔之谜新说 阅读答案
问题:1、给下面加着重号的字注音。①堆砌()②混()凝土2、文章素①段中加线的句子有用词不当的语病,请找出来并修笔充组妒比响依督张逐改。3、根据文章内容,请你用简明的语言解释什么...
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求一篇描写玉外形温润的文章,400字左右5
谈到琢玉来自,大师侃侃而谈:“玉不琢不成器。纵是稀世罕见的玉石,没有工匠的精心打磨也360问答难成大器。我一直对自己说琢玉来不得半点马虎。我更不允许有潦草的设计。车流畅的线条,天...
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找一本四四八八的耽美文,穿越还珠的,八八开妈落给四四生了一对龙凤胎,那
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