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(1/2)各项均为正数的数列{an}的前n项和为Sn,且点(an,Sn)在函数y=1/2x^2+1/2x-3的图像上.1求数列an的通...(1/2)各项均为正数的数列{an}的前n项和为Sn,且点(an,Sn)在函数y=1/2x^2+1/2x-3的图像上.1求数列an的通 求以下物理题目答案下列说法中错误的是A.电动机是一种电源B.用电器是用来工作的设备C.平常说的电线也叫做导线D.验电器可用来检验物体是否带电在日常生活中.人们常说“开灯”“关灯” 东财10春学期《大学英语2》在线作业二14-25答案14. Guest: Oh, it's ten o'clock. I'd better go now. Host: ______A. OK. Please walk slowly.B. Why do you want to go now? Don't you want to stay?C. Yeah, it's really late. Why not immediate 东财10春学期《大学英语2》在线作业二1.Mickey:You look a little pale.Are you OK?Nancy:_______,I feel terrible.A.To speak outB.To begin withC.To tell you the truthD.To sum up满分：4 分2.Adam:Mmm…..This is the best pudding I've ever 你好 请问你有东财10春学期《大学英语2》在线作业答案吗可以告诉我吗 Should friends be different or the same英语到底讲不讲语法? “friends”放的位置怎么会是这样的呢,放在“Should” 和 “be”,这叫我们怎么学啊,这么没规矩?谁能解释?谢谢 Should friends be different o____ the same. Sarah has read lots of stories by American writers．Now she would like to read ________ stories by writers from ________ countries．A.some; anyB.other; someC.some; otherD.other; other这里为什么选C不选D呢? 东财10春学期《 大学英语1 》在线作业一(1-3) 1.已知圆C：x^2+y^2-8y+12=0 ,直线l：ax+y+2a=0当a为何值时,直线l与圆C相切2.已知圆C：x^2+y^2+2x-6y+1=0,直线l：x+my=3（1）若l与C相切,求m的值（2）是否存在m值,使得l与C相交于A,B两点,且OA向量点乘OB向量=0 1.若直线x=1的倾斜角为阿尔法,则阿尔法.填空2.已知ab小于0,bc小于0,则直线ax+by=c通过（ ）象限3.直线x-y+1=0上一点p的横坐标是3,若该直线绕点P逆时针旋转90度得直线L,则直线l的方程是?4.已知点A 写一个我的英语老师 我有一个非常好的英语老师 英语怎么写 我们英语老师布置的一个作业!英语单词中发i：的有哪些?（越多越好）还要加中文那个稍微多一点 初中英语2题 i will be happiness是什么意思 Our friends are happy with the _________ (born) of our daughter. Are you happy with our new home?的中文意思 Dreaming dreams with happy Dadings . 英语翻译和往常一样,王先生六点半就起床锻炼了. 做初中英语阅读如何把握时间 Tim was seen______（get）out of the subway station on centre street.When and where to build the new factory_____yet.A.were not decided B,are not decided C.has not been decided D.have not been decided 有这样的英语老师吗?这样的老师对吗?我现在上初一,英语老师是班主任,她狠严,每学过一个话题的英语课就要小测,小测在80分以下的还要中午留下来再小测,错2个地方（不是错2个句子单词什 求东财10秋学期在线作业 大学英语2答案 谁有11秋东财大学英语2在线作业一、二、三、四的答案 如题 厂长英文怎么讲 请问“董事经理”英文应该怎么讲. “总经理室”英文怎么讲 代理经理英语怎么讲 Gymnastics is not ___(easy) science is not easy的意思