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发表于:2019-12-19
问题详情:下列物质*质的递变关系正确的是 A.原子半径:C>Al>Na>K B.碱*:NaOH>KOH>Ca(OH)2>Mg(OH)2C.离子半径...
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发表于:2020-10-19
问题详情:下列符号只具有微观含义的是()A.3H 2 2【回答】A知识点:化学式与化合价题型:选择题...
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发表于:2021-06-03
问题详情:Wanttogetthin?Eatmorefruitandvegetables—they'realowcalorie(热量)wayoffillingup,right?Itdependswhichonesyoueat.Eatingstarchy(含淀粉的)vegetablessuchascornandpo...
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发表于:2018-11-24
Ofcourse,notallofthemarelow-cal,buttheyaretentimesbetterforyouthanthejunkyouusuallyeat.Halfthemiceineachgroupateahigh-fatdietfor16weekswhiletheircounterpartscrunchedonlow...
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发表于:2021-03-22
问题详情: 下列金属中,活动*最强的是A.Mg B.Cu C.Al D.Ag【回答】A知识点:金属的化学*质题型:选择题...
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发表于:2024-01-07
1、ThechildrenCAL'ledhimuncleLi.2、DevelopmentofWPFCompositeApplicationbyCAL3、Thenexttimetheclientconnects,anattemptismadetoupgradethevalidatedtemporaryTerminalServerCA...
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发表于:2021-03-01
问题详情:下列物质中不能与NaOH溶液反应的是A.Na B.Fe C.Al D.Cu【回答】BD知识点:铁和铁的化合物题型:多项选择...
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发表于:2021-07-18
问题详情:已知某抗**X的组成可表示为aMgCO3·bMg(OH)2·cAl(OH)3·dH2O(a、b、c、d为最简整数比),为确定X的化学式,某研究小组做了如下实验。 (1)写出Al3+的结构示意图 ...
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发表于:2021-01-03
问题详情:WhenSteveJobswasbornonFebuary24,1955,inSanFrancisco,California,hisunmarriedmotherdecidedtoputhimforadoptionbecauseshewantedagirl.Sointhemiddleofthenight,hismother...