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七位数有小到大排列.他们的平均数是27.前四位的平均数是25.后四位的平均数是30.问他们的中间数是多少不对啊 如果是31的话 那么后面4个数的平均数怎么能是30呢 Ⅲ英语填词：1.She ——（醒来） a terrible dream when her mother entered the room.1.She ——（醒来） a terrible dream when her mother entered the room.2.We help ——（互相） with our homework in the summer holiday.3.Man should 中国近代史上历次反侵略失败的原因要求1000字左右~ she walked into the room on t___ when she saw her mother sleeping in it When she came into the living room,her mother was reading a letter from her father.这个句子中哪个是主句哪个是从句?怎样分辨一个从句中,哪个是主句哪个是从句? 中国近代史上 , 台湾因什么战争中清军战败而被日本割占? 关于（高三）高中英语大作文前面30字的概括（Summary）.一定要这样开头吗?我们老师硬是要我们套句型,第一步要分清是什么文体.第二步就开始套句型了：例如：故事类：The story tells us sth/ tha 英语练习 1.where have you ___ Tom has____to the libra英语练习1.where have you ___Tom has____to the library .And I went there to ask him some questionsA.been,been B.gone,been C.gone ,goneD.been,gone 2.--Did you have someone _____the trees--Yes ---_____Tom?---He's______home.( )A.Where's,at B.Where,in C.Where,at D.What's,at——____,what's that?——_____,I don't know.( )A.Sorry,Excuse me B.Excuse me ,SorryC.Hello,Sorry D.Sorry ,Sorry . 已知全集U=｛1,2,a平方+2a-3｝,子集A={/a-2/,2},CuA={0},求a的值 所得税汇算清缴是怎么回事啊?怎么计算? 公司所得税汇算清缴怎么做哦? 所得税汇算清缴我公司去年被认定为国家重点扶持的高新技术企业,可减按15%税率缴纳所得税.但我填完税收优惠附表通过后,总申报表显示的税率仍是25%,结果与我自己计算的数据不一致,怎么 所得税怎么汇算清缴 所得税及其汇算清缴我们是商业企业一般纳税人,假如2011年1月份-3月份累计盈利是2000元,那么应该缴纳所得税2000*25%=500元,做分录是3月底 借：所得税500 元 贷：应交税金-应交企业所得税500元.4 she looked at me in ______ when i came into her room .A.glad B.huppy C.excited D.surprise 改成被动句：When I came in ,she was cleaning the room Where is Tom ?I hve something important to tell him I last saw him _in the library readingA:sit B:seated C:seating Dsat 答案是B 为什么呢 where's Mr lee?I have sth.unusual to tell him.A You may not find him.he has been to Japan.B You won't find him.he has gone to Japan.答案给的A,但是我觉得应该是B,因为用A的话不是表示已经从Japan回来了吗? A={a平方,2｝B={1,2,3,2a-4} C={6a-a平方-6},如果C属于A,C属于B,求实数a的取值集合 抛物线y平方=2px(p>0)的动弦AB长为a（a>=2p）,则弦AB的中点M到y轴的最短距离为? Tom__look after his mother.She has been ill these days A.have to B.has to C.had to D.will have to Tom came home with a very serious look on his face.翻译 Look,Tom is making ___(face)如题 tom never works hard at his lessons,so it is not___to see a ___look on his face after the exam.A surprised disappointing B surprised disappointed C surprising disappointing D surprising disappointed 选D 为什么 二次函数的顶点与X轴的交点围成的三角形为直角三角形△是多少如题会+分 哈哈 我算出来是4 哪个人写的多久哪个了 the noise brought the kangaroos running into the room(running作什么?）在句中充当什么?为什么用ing? 已知三角形的三个顶点都在以下表格的交点上,其中A（3,3）,B（3,5）,请在表格中确立C点的位置,使S△ABC＝2,这样的点C有多少个,请分别表示出来. 2a^2-7a+2和a^2-6a+1怎么比较大小rt I have some pen pals in the Uuited States改疑问 英语翻译Joh is from Australia We often chat on the Internet John likes pbying soccer very much His favorite soccer player is Ronaldo He wants to go to China and learn I have already been to Water World with my parents.（改为否定句）