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用数字和符号表示 1硝酸根离子 2甲烷 32个亚铁离子.
Afterhardworkheingettingascholarship.success
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﹣Manypeoplethinkwomenarebetteratcookingthanmen. ﹣﹣.Mosttopchefs厨师intheworldaremen. A.Exactly. B.Iagree. C.Idon'tthinkso. D.Notatall.
﹣YourEnglishissogood.Canyoutellus? ﹣Athome﹣school.Myfathertaughtme. A.wheredidyoulearnit B.wherewillyoulearnit C.whereyoulearntit D.whereyouwilllearnit
usefulsuggestionitwas! A.How B.What C.Whata D.Howa
回答下列圆弧金属有关的问题. 1工业上炼铁常用的还原剂是 2如果制取0.2氢气.理论上需要g9.8%的稀硫酸与足量的锌反应 3验证铁比铜活泼可将铁放入硫酸铜溶液中只要观察到现象即可说明该反应中Cu2+填“得到”或“失去”2个电子.
Jackhadahighfeveryesterdaysohewas缺席fromschool.
结合盐酸硫酸的相关知识回答下列问题. 1人体胃液中的酸是 2两种酸中可以做某些气体干燥剂的是 3从微观角度看它们的稀溶液具有相似化学性质的原因是 4验证某白色沉淀是否含有BaCO3和BaSO4可以选择.
﹣PeteristhereanythingelseyouwanttoknowaboutChina? ﹣YesIamstillwondering. A.howisChinesepapercutmade B.howwastheGreatWallbuiltinancienttimes C.whytheChinesepeopleliketoplaythedragondance D.whydotheChinesepeopleeatricedumplingsatDragonBoatFestival
请回答下列与水有关的问题 1电解水用来检验负极产生的气体 2日常生活中常用的方法降低水的硬度 3除去水中泥沙等难溶性杂质常用的操作是 4农业和园林浇灌植物时将大量水漫灌改为喷灌滴灌的目的是
ThePalaceMuseumagain. A.worthvisiting B.isworthvisiting C.worthtovisit D.isworthtovisit
根据句意用括号中单词的适当形式填空使句子的意思完整正确. Trytohelpotherswhenyoucan.
carewillbeadisasternotonlytodoctorsbutalsotopatients.
WorldWarIIinEuropein1939andendedin1945. A.brokeinto B.brokeout C.brokedown D.brokeup
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粗盐中含有MgCl2CaCl2等杂质工业提纯粗盐的工艺流程如图所示 1CaOH2溶液的pH7填“>”“=”或“<”=步骤①反应的化学方程式为. 2步骤③操作a的名称是.步骤④加入适量盐酸的目的是. 3若步骤①和步骤②的顺序颠倒则最后所得的精盐水中还含有.
Wehavedifferentlessonsina固定的ordereveryday.
﹣﹣﹣AlthoughMsZhouisanoldladysheisalwaysinthepink. ﹣﹣﹣Yes.Becausesheexerciseseverydayandeatsabalanceddiet.Hereinthepinkmeans. A.healthy B.lucky C.beautiful D.creative
ThisisbookI'vetoldyouabout.It'swrittenbyuniversityteacher.A.thean B.aan C.thea D.athe
Marywillmakeaplanassoonassheherhomework. A.finish B.finishes C.finished D.willfinish
herhusbandhersonissoactiveasher.Theydon'tliketotalkmuch. A.Notonlybutalso B.Eithernor C.Eitheror D.Neithernor
Thisbookhasbecomeasymbolofthe胜利ofthehumanspirit.
根据句意用所给单词的适当形式填空.每空一词. Ifyouworkhardyou'llsuccessintheexams.
﹣﹣﹣It'stoonoisyoutside.Ican'tfallasleep. ﹣﹣﹣NeithercanI.Wehavetonewwaystosolvetheproblem. A.comeupwith B.endupwith C.makeupwith D.catchupwith
Thegreenbagremindedtheoldmanthedayswhenhewasyoung. A.at B.with C.of D.on
Thepictureisquitevaluebecauseithasalonghistory.
﹣Ifeelstressedfromtimetotime.Couldyougivemesomeadvice? ﹣sharingyourworrieswithyourparents? A.Whydon'tyou B.Howabout C.Couldyouplease D.Wouldyoulike
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