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Happiness is still in your heart We have enough bread.(改成句意相反的句子)要改成We are _____ _____ bread There's enough bread left,we don't have to buy more可以说成have got enough bread,we don't get 为了检验SO42-,应先加过量稀硝酸后再滴加Ba(NO3)2,观察是否有沉淀现象这句话为什么是对的,不是硝酸可以把SO32-氧化成SO42-吗? WE haven't enough bread for .WE haven't enough bread for后面用anybody还是everybody?麻烦说下理由 为什么Ba(NO)3溶液和稀硝酸可以验证SO42-的存在 如图所示电路中,R1=60欧,电源电压不变,当滑动变阻器滑片P在R2中点时,电压表示数为6V时；当滑片P在b端时,电压表示数为9V,求R2的最大阻值和电源电压. 如图所示电路图,电源电压6V不变,闭合开关后, 如图所示电路,电源电压不变,当开关由断开变为闭合时,问两表的示数变化 They are the same in size and s_____ next winter,______i'll stay in harbin,will surely be another exciting holiday.A.which B.when C.where D.that 为何选B? the graduates will stay in Yunnan _______next yearA sometimeB at some time 英语翻译the extent of differences between populations that are diverging into separate species or between species that have already diverged is represented by a statistic called genetic identity-the relative proportion of the same structural gene 英语翻译As the First Great Awakening tore apart the Celtic peoples in the early 18th Century,the Pagans hid,fearing for their lives at the bloodied hands of the Puritans.Above all,the Puritans sought the great Pagan blacksmith - the one-eyed Oban 创新的数学模型是如何产生的?现在要建立一个数学模型,具体应该怎么做,才能既表现出创新性, Next winter___you will spend in Harbin,I'm sure,will be another exciting holiday.A.which B.when C.in which D.what为什么答案是D?2.John is one of the students___the exercise.A whom have finished B who has finished Cwhom has finished D who haven't When your mather comes back,you should study hard Jim will go skiing (next winter holiday).对括号内部分提问 英语翻译holacomo EstasEstas durmiendohokey te yamo despuesdisculpame 请问这句话怎样翻译,很晕.谢谢There is only 11 percentage points,which is relatively low for families in poverty in all six types of families.后面半句不懂.谢谢 英语翻译After reading those books or attending the seminars,I would be fired up until I went out into the real world and had my emotional bubble burst by individuals who did not want my product or service and who could care less how enthusiastic 有关驻波的问题.一端封闭一端开口的玻璃管内空气柱的振动简正模式的开口一端为什么是处于波腹?（开口处明明都是一样的空气,波阻是一样的,不存在波密和波疏介质） 英语翻译 驻波的问题两端固定的绳子上有波长分别为2m和1m的驻波,问以下哪个波长的驻波不能发生在这条绳子上?A.4m B.2.5m C.1.5m D.67cm绳子长12m 关于驻波的问题在两端开口长度为L的管子里,可能产生驻波的声波波长有哪些?在一端开口一端封闭长度为L的管子里,可能产生驻波的声波波长有哪些? 从实际出发,不能不切实际的追求高的目标是什么成语 问下关于驻波的问题.入射波经过反射点（节点）反射后,反射波的波函数为 y=Acos[2派(vt+x/波长)+派]入射波的波函数为：y=Acos[2派(vt-x/波长)+派]我的问题是产生半波损,不是只需要加上或减去派 高中生对钱的看法的结题报告 Welcome to Sina Ut Game Music room 川气东送和西气东输请问这里的气指的是天然气吗? 川气东送经过那种尺度的地理区写出该区域名称 西气东输和川气东送区别 川气东送不属于西气东输工程么?