- 问题详情:以下比较中正确的是A.微粒半径:O2-<F-<Na+<Li+B.电负*:Li<Na<K<RbC.分子中的键角:CH4>H2O>CO2D.共价键的键能:C—C>C—Si>Si—Si【回答】D知识点:化学键题型:选择题...
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- 问题详情:下列关于碱金属的叙述中正确的是()A.K能从LiCl的溶液中置换出LiB.随着原子序数的递增,单质与水反应的剧烈程度减弱C.随着原子序数的递增,单质熔点逐渐降低D.Cs2CO3受热易分解【回答】C【详解】A.钾是活泼金属,在溶液中先和水发生反应,K不能从LiCl的溶液中置换出Li,故A错误;B.同...
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- Shewilleverbeassociatedwiththewomen'slib.I'mnotadvocatingthatwesacrificeourselvesonthealtarofbravadoandwomen'slibbutisn'tittimetogivetheblamebackwhereitbelongs?Inthespringof1972,TIMEdevotedaspecialissueofthemagazinetoassessingthestatusofwomeninth...
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- 1、IvotedLibDem.2、ThisisnottheproportionalrepresentationofLibDemdreams.3、LotsoferstwhileLibDemvotersare"notveryrational",regretsaseniorMP.4、ButheknowsthatmanyLibDemactivistsareinstinctivelyopposedtocollaborationwiththeTories.5、SomeLibDemsufferi...
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