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电荷实际存在么,是一种粒子么?如果电荷不是一种粒子,那它的实质是什么? 怎样往风油精的瓶子里灌水 为什么只存在2种电荷? i like a buy a house 这句话的语法分析,这是大学课本的一句原话,并没有写错.请i like a buy a house 这句话的语法分析,这是大学课本的一句原话,并没有写错. I'm confused.轮子半径RA点加速度要用a（A对地）=a(A对o）+a(o对地)算出来a（A对地）=v^2/R我想问为什么算A点加速度a不能用2v当线速度,把A到轮底距离2R当半径? Lizards r different from warm-blooded animals in that lizard____(lack) a build-in temperature control warm blooded animals possess. BANCO CENTRAL DE RESERVA DEL PERU秘鲁币汇率是多少一位朋友今天在汽车上被骗了,换了18张50元面额的印有BANCO CENTRAL DE RESERVA DEL PERU的钱币,回来上网查询得知是秘鲁货币,想问一下秘鲁货币兑换人民币 BANCO CENTRAL DE RESERVA DEL PERU 是那国的货币,100兑人民币多少元? The weather will become ________ (bad) on Monday than today. often能组什么句子呢要组20个 This is _____uniform.选an ,a,还是the 关于often的句子It rains very often this year.有没有这样的句子如果有,可以给我说说吗?越详细越好very often成立吗？ Everything we do has a function,and being confused is no exception . 得天下英才而教育之,三乐也. "he is good at repairing computers "其中“at repairing computers” 在句中做什成分? I’m lying through my we can call each woman ( ) A.Mrs B.Mswe can call each woman ( )A.Mrs B.Ms C.Miss In our opinions,what Mr.He ( )good to us.He is strict with us in everythingA.do do doB.does does doCdo does doDdoes do does从来没见过这样的题,一个空让连着填三个各种do是要闹哪样 Is this book out in paperback?中的out是什么意思,Is this book in paperback?这样就行了吗？Is this book paperback? 2011高考作文 孟子三乐“仰不愧于天,俯不怍于人” 作文素材 不要古代的人物 父亲节快到了,谁能帮我写一篇关于父爱的文章? 根据句意首字母提示完成下列句子1、What do you n_____ A bag of salt.2、I want to do some s______ in that shop. the amber room ( ) to the eight wonders of the world . Catherine II had the Amber Room moved to a palace outside St Petersburg where she spent her time.是定语从句还是地点状语从句? You're not supposed to walk on my heart 翻译成中文 often是否可置于句末?顺便帮忙造个句子：你通常喜欢去哪里度假 用often再写一个句子 天下英才为我所用 是褒义还是贬义啊,一个公司的企业文化中可以这么说吗? 1The old house is not so beautiful as the new one改为同义句,2We can not decide which way we shall take.3翻译,今年游客的数量必去年多得多.请各位自己翻译,不要用翻译工具,好多都是不对的 According to happy Software is the set of programs that instruct the hardware and is easier to modify than hardware 的翻译 hardware and software他们两个有什么不同点~1