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胞外钠离子浓度升高与降低分别对动作电位峰值有何影响?请说明原理, 动作电位是怎么发生的?如何证明动作电位是钠的平衡电位? 请问谁有一些关于名言 一些名人名言我们作业总是要用,什么方面都行,最好多一些方面,比较全面最好,每个方面须超过5条,3个方面以上,以后要用的话就不用费力找了不过我不是急用，但也希望有人来！ 山东哪里产贝壳最多?包括所有贝壳,牡蛎,文蛤等,虾壳蟹壳也行. 从2010年2月20日到2019年8月7号有几天?我希望大家可以好好回答,对于我,这个有非常重要的含义, 甲、乙、丙三个数的平均数是140,甲、乙两数的比是1:4,乙、丙两数的比是3:5.这三个数各是多少? 汽轮机的基本原理和特征是什么 write something about your coutry.(至少30个）急用,如果会那就谢谢啦这句话的翻译 加工贸易型经济和进口-加工-出口型经济一样么? Your Free Alibaba.com Membership has been confirmed翻译什么意思? 直话直说的英文是什么 Most srudents likes Miss Liu.改为同义句Most stdents _____ ______ _____ Miss Liu. be good with翻译 那些几级翅膀羽毛在哪得的?谁知道说下谢谢 “跟我玩”翻译成“play with me”对吗?或者有什么更好的翻法吗 Could you post the letter for me?A I've got a toothache B With pleasure.c The same to youD Very muchE Because he is ill 羽毛有什么用?几级可以弄翅膀?最好详细点! Do you want to(r )the letters from your dad?（A )the students like Miss White.I have(m )good friends in my school.I like the red cap a lot.(改同义句）Chinese,does,he,good,speak（连词成句）the,I,tell ,will,girl's,you,name（连词成句） the students from （）like the comedies是填 japanese 还是 japan 为什么 the person next to Daisy on the bus was an( ).怎么填? .It was because he had missed the first bus.是完整的宾语从句吗 where can download songs for free? where can free download english songHI...I WANT find english song FREE AND SIMPLE DOWNLOAD...THX The driver didn’t 36to start the bus soon because it was not yet为什么36只填intend 不填deside 为什么新马歌手总是prefer chinese song to cantonese song?他们大部分都会讲广东话甚至比华语讲得还流利,为什么却很少出广东歌? Most chinese student have difficuities learning engjish是什么意思 accelerate to maximum speed,then bring your car to a full stop in the designated blue 这个事IPAD游戏GT Racing 生涯模式下的一个直线加速的关卡 但是就怎么也过不了 It is a year since I goodbye to him .(say) accelerate和speed的区别?To make the car 'roar down the arcade',the driver must have _____.a.accelerated b.sped c.run d.reversed 为什么不能选b?怎么区分accelerate和speed? WE SAY GOODBYE TO THEPAST YEar这句话是什么意思 accelerate与speed怎么区分?