淘宝代写作业店铺

元素周期表,每一横行即（-----):周期表每一横行叫做一个周期.共有----个横行,有----个周期每一纵行即（---）：周期表的18个纵行中,除8、9、10三个纵行共同组成一个族外,其余15个纵行,每一个 降冰片烯含两个五元环,这种说法对么? 电子书txt什么意思 写一条化学方程式：一种单质氧化另一种单质 TXT什么意思? 请问txt格式是什么意思 计算机导论：微型计算机的主存储器一般由（ ）和（ ）组成 利用一种阳离子氧化一种单质的方程式? “电子书”的意思?几个字就行了 电子书是什么意思 镀锌Z型钢厂家哪 里找?镀锌Z型钢价格哪里便 镀锌型钢重量怎么计算,最好是有表格 为什么鱼离了水会死 FeCl3溶液中加入KSCN溶液不变红,加入氯水后溶液变红色,这句话对吗?原因 jar是什么意思? 微型计算机主存储器的基本编址单元的长度为?A.32位B.l位C.8位D.16位 某32位微型计算机中,存储器容量为1MB,若按字节编址,那么主存的地址寄存器至少应有（）.A.20;B.24;C.32;D.16;A.20请问原理是什么呀,.. H2SO4+Ba（NO3）2=====Baso4+2HNO3 为什么生成的是2HNO3而不是HNO3 KOH和BaNO3混合溶液中加H2SO4,沉淀是一加硫酸就生成的么? ahead of time=( )( ) 在平面直角坐标系中.直线y=2/3x-2/3与矩形abco的边oc,bc分别交与点e,f已知oa=3,oc等于=4则△cef的面积 英语翻译Don't know when I've been so blue,Don't know what's come over you,You've found someone new,And don't it make my brown eyes blue.I'll be find when you're gone,I'll just cry all night long,Say it isn't true,And don't it make my brown eyes b 如图6 在直角坐标系中,矩形ABCO的边OA在x轴上,边OC在y轴上,点B在坐标为（1,3）将矩形沿AC翻折,如图6 在直角坐标系中,矩形ABCO的边OA在x轴上,边OC在y轴上,点B在坐标为（1,3）将矩形沿AC翻折,B点落 横行,斜行,竖行和相同 谁能帮忙读一下： Teachers, Students, Good morning! Accompanied by the first ray of morning sunshine the prime of life comes not again on first difficultly in the early morning.我记得好像是一句谚语，自勉的话。 硫代硫酸钠和硫酸反应,其沉淀物什么? In the early morning the first sunshine is I give you warm wishes.I hope you can happiness in the last day of 2013.At the same time be able to find mei spring scenery through the snow near 2014,sound vientiane new water chestnuts.Decorating fook lam When you see a big supermarket,turn left.Then go down Bridge Street and turnleft.Then go down Bridge Street and turn left at New Park. down you Center Street when on your right go just see a park big (连词成句) I have never had anyone that was so loving,considerate and happy to be with the man you love as you it makes cold chills go down my back when I think of you. When you want to eat in a restaurant,you first go and sit down at a t__首字母填空