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项数公式 项数：（末项求和公式：（首项+末项）*项数/2项数：（末项-首项）/公差+1这两个公式的具体解释 英语翻译No one ever said thatLove was gonna be easy Gotta take the ups and downsThe in-betweens If you take this journeyGotta give yourself completely Never let nobody ever step on our dreamsYou better stop Listen to these words that I sayYou bet 某轮船顺流航行2h,逆流航行3h,已知轮船速度为a千米每时,水流速度为b千米每时,则轮船共航行了多少千米? 1.一个平行四边形比与它等底等高地三角形面积大27平方厘米,则平行四边形的面积是多少平方厘米?2.快、慢车同时从甲、乙两地出发,相向而行,4.8小时后在距中点7.8千米处相遇.已知慢车每小 用正确形式填空：They don't like David because hi is ___ (friend) to them. where go tomorrow you will的意思只要意思 Where will you go I wonder.(合并为一句话） I( ) ( ) ( )（ ）go. where will you go sightseeing where will u 底面是15厘米.现将甲水箱中部分水倒入乙水箱,使两个水箱的水面高度一样,此时水面高度是多少厘米?完整题目看追问。 1.一个长方形的周长是40厘米,他的宽和长的厘米数是由一个质数和一个合数组成的,它的面积最大可能是多少?最小可能是多少?2.幼儿园的4个小朋友,他们的年龄一个比一个大一岁,他们的年龄的 已知f（x）函数是一次函数,且有f（f（x））=4x-3,求函数f（x）的表达式. 代数式ax³-10x平方+6x+c/3x³+bx平方-2x+4的值恒为一个常数,求a,b,c和代数式的值. where is Anhui? what is the capital of Anhui?第一句答语开头是It's in the where is Guangxi?what is the capital of Guangxi?答语第一句答语开头是It's in the 小木块放在桌子上,下列说法正确的是1.在接触处只有桌子有弹力产生2.在接触处桌面和小木块都有弹力产生3.木块对桌面的压力是木块形变后要回复原状而对桌面施加的力4.木块对桌子的压力 The children __ (play) there ___ (happy).求回答..求详细解释 跪了 不管我怎么写都有语法错,.Look! The children __ (play) there ___ (happy) Look! They __ (lie) in the sun There are a lot of children ____(play) basketball there.____(luck) ,we bought some food,so we didn't go hungry. i will go where you go.(这句话中的where什么意思? where____ will you go,children?Let's go to Binhai,a nice and modern city.A.place B.other C.else D.the other 若曲线f(x)=ax^3+Inx存在垂直于y轴的切线,则实数a的取值范围 若曲线f(x)=ax^5+Inx存在垂直于y轴的切线,则实数a的取值范围. 英语翻译 If fall in love with you is a kind of wrong,I prefer to a wrong again 如上 make choices about Life is all about choices 翻译成中文是什么? life is all about making priorities. 怎样理解这个英语句子..这个wound是什么意思..Young is a tightly wound and competitive person who learned how to play the game from a disciplined father. 英语翻译如题,材料方面或者冶金方面的 英语翻译如：Layers can consist of a single ply or two or more plies laminated such that their grain is parallel ,a panel can contain an odd or even number of plies but always an odd number of layers. The person you love is your love.通俗的翻译一下 用比例解最后一道题,最好也用算术解一下