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用氢氧化钡叙述碱的通性,并写出化学方程式.用氢氧化钾叙述间的通性,并写出化学方程式.以氢氧化钡和氢氧化钾为例,叙述碱的通性并写出有关的化学方程式~(对比的方法)氢氧化钡 * 氢氧化 碱的化学通性（以naoh为例,写4个化学方程式） 怎么可以快速背地理地图, 怎样才能快速地背地理地图? 初中地理怎么样才能轻松记住地图 什么化学元素最毒谢谢了,大神帮忙啊 幸福是什么 结合生活实际 【高一化学】关于酸碱物质的通性》》》（1）写出酸性氧化物的通性（2）写出碱性氧化物的通性（3）写出碱性物质的通性（4）写出酸性物质的通性（5）怎样区分酸式盐和碱式盐? 酸碱的通性是什么. 酸碱的通性 幸福是什么? 尽量用自己亲身事例说明哦! 为什么酸碱具有通性,而盐只具有一般性质? 酸碱通性与氧化还原的关系：A.酸的通性于氧化还原反应有关 B.碱的通性与氧化还原反应有关C.酸碱通性于氧化还原反应都有关 .D酸碱通性于氧化还原反应都无关 You can find____ in the classroom._____of us need to go to school today.A.none,none B.none,no one C.nobody,no one D.no one,none求答案和none,nobody,no one 的区别. You don't need to wear the school uniform today.同义句 完整的问题在下面、（初一下册英语）You don't need to wear the school uniform today.同义句：You don't （ ）（ ）wear the school uniform today.They will get to France tom The school _____ is locked because today is Sunday.(_ _ t _) 世界三大神秘爆炸是哪三个 世界三大运河是哪三条? 世界三大草原是哪三个? 世界三大长河是哪三条 turned be into a baker. be turned into realities ------- can be turned into a -----A.One- nineteenth,percent B.Three quarters,percentae C.A half,fifty percent D.Two- thirds percentage 英语翻译特别想问这里cum是什么意思 滴定管和移液管的区别（最好详细些） 移液管 容量瓶 滴定管的最小分度值 In the end,the worm ___into a bird A.got into进入 B.flew into飞进去 D.turned intoin the end,the worm ___a bird A.got into B.flew into C.became into D.turned into Today is sunny day,the sunshine is very nice.肯定回答 A bird flew into the house t____the open window(横线上填什么) 英语finally the big worm （c ） into a beautiful butterflyfinally the big worm （c ）c开头的字母 into a beautiful butterfly 英语 there was an exciting moment in our class when a large bird flew( )the room A.from b.into c.ontod.with Finallythe big worm (c ) into a beautifui butterfly