两个带有等量异号电荷

急初二课外语文文言文】《右溪记》阅读答案这条小溪为什么被称为右溪?从文中的描写看 右溪具有哪些特点（用自己的话概括）?作者为右溪作记的原因是什么?目的何在?（用文中句子回答 {（m+n/2)+(m-2/3)=6,4(m+n)-5(m-n)=2 用加减消元法解二元一次方程急求解答谢谢! m+2n+5=0 7m-2n-13=0 二元一次方程 加减消元法 It takes time to learn how to cope with living in a totally new environment─it's only natural to need a little bit of help at first.only natural to 若P（a+b,-5)与Q（1,3a-b）关于原点对称,则a的b次方的值为多少? 若点P(a+b,-5)与Q(1,3a-b)关于原点对称,则x*2-2ax-b／2因式分解 点A(－8,5)在第___象限,它关于原点的对称点坐标为____,关于y轴的对称点坐标为____. +如果点A(3a-3,-5a-2)关于原点对称点为B,而B又关于Y轴的对称点为C,在第二象限,化简√25a²+20a+4-√a（a-2）+1 here are some apple for you改为单数句 Here are some rulers for you.改为否定句 He is working out at the gym next Friday night.改为一般将来时 He is working out at the gym a lot these days.翻译一下这个句子.期中的短语 work My father is working out at the gym (next week).对括号部分进行提问 i've been working out the gym since january的正确解释及分析 At the moment I'm working什么意思 写你最爱的一个人,是写别人怎莫关心你,像妈妈,爸爸,爷爷,作文 描写爷爷的爱的句子或作文 They want to help the people who is need help有没有语病-- Where is the art room?It‘s（ ）the second floor.（选序号） A.at B.in C.on Where is your classroom?It's on____floor.A.two B.secon C.the second 理由. second,gym,the,is,the,floor,on连成句子 心田上的百合花读后感! 猴子是我最喜欢的动物Monkeys are my favourite animals.（换种说法,句意不变） 请用一句话形容中国铁道部! 铁道部怎么了 铁道部的政策碉堡了,这个碉堡是什么意思啊?一句话什么意思?反应了什么社会问题 这个作文咋写 这个作文咋写啊? We'll meet at the school gate(对at the school gate提问 We meet (at the school gate)对括号内部分提问_____ ______ you ______ 对括号部分提问：We often meet (in the school at 8"o clock.)_ and _ do you often meet? We'll meet kate at school tomorrow.对‘tomorrow’提问