1,甲,乙,丙三栋别墅的平均售价是82万,甲,乙两栋别墅的平均售价86万,乙,丙两栋别墅的平均售价是77万,乙栋别墅售价

设西区距取奶站为a 米,（我认为这道题只能设参数）
120x=70a+80a,X=(70a+80a)/120=5a/4

A131,A132,A133,A134,A135,A136,A137,A138,B131,B132,B133,B134,B135,B136,B137,B138,C131,C132,C133,C134,C135,C136,C137,C138

I have a friend called Chenyu.She's ten years old now,she's a lovely girl.She lives in FlatA,Block3.She walks to school every day,because her home is not far from school.Her marks are not very high,but not poor.She is vivid.So we are best friends!

There are three buildings in our school.
希望对你有帮助，祝快乐。欢迎顺手点击采纳，O(∩_∩)O哈哈~

△ABC两个角平分线的交点即为P的位置，作图“略”。

Our new School
Our new school, which was set up in 2008, lies in the south of this City. It has been two years history.It is Municipal key schools and famous in our city .
It has 24 class...

My School
My school is very beautiful. It is in Guicheng, near the Qiandeng Lake. Do you know it? It is Nanhai Experimental Primary School. I like my school very much.
There is a big playground in my school. We have P.E. class on the playground and we often play sports on it , too. Our teaching building has five floors. My classroom is on the fifth floor. It is big and clean. The computer rooms are on the third floor. There is a library on the second floor. There are many books in the library. I often read books here. There are some music rooms and art rooms in the teaching building, too.
The teachers in my school are very kind . The students are very polite and smart. I am happy in my school.
--------------------------------------------------------------
希望你满意哦.*^O^*..

No. 2 of Block 3, Huaxing Community, Boai County, Jiaozuo City, Henan Province

（1）证明：由题意得：AC=CD=DA，
∵∠ACB=90°，
∴△ACD是等边三角形，


∵DE⊥AC，
∴DE垂直平分AC，
∴AE=CE，
∵∠ACB=90°，
∴∠ACE+∠BCE=∠CAE+∠B=90°，
∴∠BCE=∠B，
∴BE=CE；
∴AE=CE=BE；

（2）∵DE垂直平分AC，
∴PC=PA，
∴PB+PC=PB+PA；
∴PB+PC最小，也就是PB+PA最小，也就是P、B、A在同一直线上是最小，
即当P在E处时最小，
当点P在E处时，PB+PC=AB=35米．

Welcome to our school, it has an area of 125 Mu (8.3375 hectares), over 3000 students and more than 200 teachers. The school owns one office building and three teaching buildings, you can also find a large play ground and a stadium. Computers are equipped in every classroom, so as other teaching facilities. Our school received broad applauses this year for outstadning performances.

一、符合下列规定之一的,应设置消防水池：
1.当生产、生活用水量达到最大时,市政给水管道、进水管或天然水源不能满足室内外消防用水量；
2.市政给水管道为枝状或只有1 条进水管,且室内外消防用水量之和大于25L/s.
二、消防水池应符合下列规定：
1.当室外给水管网能保证室外消防用水量时,消防水池的有效容量应满足在火灾延续时间内室内消防用水量的要求.当室外给水管网不能保证室外消防用水量时,消防水池的有效容量应满足在火灾延续时间内室内消防用水量与室外消防用水量不足部分之和的要求.
当室外给水管网供水充足且在火灾情况下能保证连续补水时,消防水池的容量可减去火灾延续时间内补充的水量；
2.补水量应经计算确定,且补水管的设计流速不宜大于2.5m/s；
三、消防水池容量计算方法
公式：
Vy=>(Qb-Qg)Tb+Vx+Vs
QgTt=>(Qb-Qg)Tb
式中：
Vy—贮水池的有效容积
Qb—水泵出水量
Qg—水源的供水能力
Tb—水泵运行时间
Vx—火灾延续时间内,室内外消防用水总量
Vs—生产事故备用水量
Tt—水泵运行间隔时间

On the left of the playground for the gymnasium, the right for the teaching building, teaching building three buildings希望你能采纳

三只小猪的故事
猪妈妈生了三只可爱的小猪,三只小猪彼此友爱,一家人一直过著幸福快乐的日子.
有一天,猪妈妈向三只小猪说：「你们都长大了,应该自己出去盖一间属於自己的房子了.」
然后啊,三只小猪向猪妈妈告别后,就真的出去盖了一间属於自己的房子.
老大盖的是草屋,老二盖的是木屋,老三最聪明了,因为它用砖块盖了一间最坚固的砖头房子,也是三间房子中最安全的了.
有一天,老大和老二出门去玩耍,结果在路途中遇到了大野狼,大野狼一看到二只小猪就说：「啊!我是大野狼,二只小猪看起来好像很好吃的样子喔!」」老大和老二一见到大野狼,马上赶紧跑回自己的家中躲起来,不过,它们并不知道大野狼也硍在它们的后面,找到三只小猪住的地方了.
这时大野狼「碰～」的一声,就轻松的把老大和老二的房子撞倒了,所以呢,二只小猪就赶快到老三的砖屋里去躲了起来,老三看到二位哥哥,就赶紧说：「快!快!快点进来,大野狼快追来了!」
后来,大野狼也来到第三只小猪房子的前面,它以为这间砖头房子跟之前两栋房子一样,很容易就撞倒了,不过,它发现它撞了好几次不旦撞不倒这栋房子,反而把自己的头撞得满头都是包.
大野狼想了很多方法都没办法进去,正生气的时候,突然发现房子的上面有一个烟囱,大野狼就爬到屋顶,准备从烟囱进去,不过,三只小猪并不笨,早就在烟囱下面用柴烧水,等大野狼从烟囱下来的时候,水也滚了,大野狼一下来就「啊!」的一声,屁股被烫得红通通,夹著尾巴逃走了,三只小猪也可以松了一口气了.
The Story of the Three Little Pigs旁白：There was an old mother with three little pigs, and as she had not enough to keep them, she sent them out to seek their fortune.妈妈：Goodbye,kids!build your own house,but be careful of the wolf.三只小猪：goodbye,mum.旁白：three pigs leaved their mother.after a while they met a man with a bundle of straw.Pig one: “Please, grandpa, give me that straw to build me a house."稻草爷爷：the house will be beautiful,but it easy to be broken down by wind.Pig one:never mind.only for live.稻草爷爷：it’s ok.here you are.旁白：Which the man did, and the little pig built a house with it.then he went into his house,said happily.Pig one:haha!now the wolf can’t catch me and eat me.旁白：pig one falled asleep in his house.then pig two met a man with a bundle of sticks.Pig two: "Please, man, give me that sticks to build a house."旁白： Which the man did, and the pig built his house.pig three knew the house is not strong,but it is easy to do.so he lived in the house.pig three keep going.The third little pig met a man with a load of bricks.Pig three:"Please, man, give me those bricks to build a house with."旁白：So the man gave him the bricks, and he built his beautiful house with them.Pig three:ok!my house is so hard.i mustn’t scare of the wolf.旁白：Presently came along a wolf, he knocked at the pigone’s door.狼： "Little pig, little pig, let me come in."pigone answered: "No, no, go away."The wolf: "Then I"ll huff, and I"ll puff, and I"ll blow your house in."旁白：So he huffed, and he puffed, and he blew his house in. pig one is scared,fortunetely he run away to the pig two’s house.Pig one:I’m regretful that I didn’t listen to the grandpa.旁白：Then along came the wolf.He is shouting.Wolf: "Little pig, little pig, let me come in."Pig one and two:"No, no, go away."Wolf:"it’s very easy.sticks is not strong.Then I"ll puff, and I"ll huff, and I"ll blow your house in."旁白：So he huffed, and he puffed, and he puffed, and he huffed, and at last he blew the house down, luckily the little two pigs run away to pig three’s house.they are scared,but pig three seemed not to be afraid.旁白：the wolf came, as he did to the other little pigs.Wolf:Little pig, little pig, open the door."Threepigs:"No, no, you are the wolf.go away"Wolf:"Then I"ll huff, and I"ll puff, and I"ll blow your house in."旁白：Well, he huffed, and he puffed, and he huffed and he puffed, and he puffed and huffed; but he could not get the house down. When he found that he could not, with all his huffing and puffing, blow the house down.Wolf: "Little pig, I know where there is a nice field of turnips."Three pigs:"Where?"Wolf:"Oh, in Mr. Smith"s home field, and if you will be ready tomorrow morning I will call for you, and we will go together and get some for dinner."Three pigs:"Very well,I will be ready. What time do you mean to go?"Wolf:"Oh, at six o"clock."旁白：Well, the little pig got up at five, and got the turnips before the wolf came.At 6 o’clock,the wolf came.Wolf: "Little pig, are you ready?"The little pig said, "Ready! I have been and come back again, and got a nice potful for dinner."旁白：Then the wolf was very angry indeed, and declared he would eat up the little pig.Wolf:you three little pigs. I wanna eat you.i will get down your chimney,and eat you.旁白：When the little pigs saw what he was about, they hung on the pot full of water, and made up a blazing fire, and, just as the wolf was coming down, took off the cover, and in fell the wolf; so the little pig put on the cover again in an instant. The wolf died, they lived happily ever afterwards.Three pigs:sing a song.

一般要求水泵的扬程是最高点满足0.5公斤消防压力.比如楼高50米,就要选用扬程90-100米左右的.
流量要求满足一小时供满足消防供水,这个根据建筑面积标准计算的.
有了流量和扬程,就可以计算出消防泵的功率和价格区间了.

一共1+2+3+……+1000
=(1+1000)+(2+999)+……+(500+501)
=1001+1001+……+1001
每个括号左边一个数是1到500
所以有500个括号
所以=1001×500=500500

解题思路：（1）设取奶站建在距A楼x米处，所有取奶的人到奶站的距离总和为y米，求出在各函数在自变量下的最小值，
（2）设取奶站建在距A楼x米处，列出等量关系式，解得x．
（3）设A楼取奶人数增加a人，在各个自变量下，解得x与a的关系．

（1）设取奶站建在距A楼x米处，所有取奶的人到奶站的距离总和为y米．①当0≤x≤40时，y=20x+70（40-x）+60（100-x）=-110x+8800∴当x=40时，y的最小值为4400，②当40＜x≤100，y=20x+70（x-40）+60（100-x）=30x+320...

点评：
本题考点： 一次函数的应用．

考点点评： 本题考查的是用一次函数解决实际问题，此类题是近年中考中的热点问题．注意利用一次函数求最值时，关键是应用一次函数的性质；即由函数y随x的变化，结合自变量的取值范围确定最值．

2号楼最好，
1号楼过于吵杂，也易受尘土。而且外局情况不明，外明堂好坏无法确定，易受煞。并有倒坐衙门之嫌，入户口与进小区口向背。
3号楼，受2号楼墙角所冲。可视为壁刀煞。后有塘，被视为金柜脱底，不聚财。
2号楼，从三栋房来看，没有受煞，只是后无靠（那其它两栋也是无靠）
楼上这位是认为各栋都有产生天斩煞之嫌，而且各栋都背后无靠，

- -
教学楼啊 ：学海无涯
寝室：独享世界（在教学楼都是讨论,在寝室里便是快乐,独自享受自己的快乐）

　　甲：（200除以400）乘以50=25
　　乙：（95除以400）乘以50=12
　　丙：（105除以400）乘以50=13
　　规律：每个情况的数除以总数乘以样本容量
　　背过吧,没办法

解题思路：（1）根据等边三角形“三合一”的性质证得DE垂直平分AC；然后由等腰三角形的判定知AE=CE，根据等边对等角、直角三角形的两个锐角互余的性质以及等量代换求得∠BCE=∠B；最后根据等角对等边证得CE=BE，所以AE=CE=BE；
（2）由（1）知，DE垂直平分AC，故PC=PA；由等量代换知PB+PC=PB+PA；根据两点之间线段最短可知，当点P、B、A在同一直线上最小，所以点P在E处时最小．

（1）证明：由题意得：AC=CD=DA，
∵∠ACB=90°，
∴△ACD是等边三角形，
∵DE⊥AC，
∴DE垂直平分AC，
∴AE=CE，
∵∠ACB=90°，
∴∠ACE+∠BCE=∠CAE+∠B=90°，
∴∠BCE=∠B，
∴BE=CE；
∴AE=CE=BE；

（2）∵DE垂直平分AC，
∴PC=PA，
∴PB+PC=PB+PA；
∴PB+PC最小，也就是PB+PA最小，也就是P、B、A在同一直线上是最小，
即当P在E处时最小，
当点P在E处时，PB+PC=AB=35米．

点评：
本题考点： 轴对称-最短路线问题；线段垂直平分线的性质；等边三角形的性质；直角三角形斜边上的中线．

考点点评： 本题考查了等边三角形的性质、线段垂直平分线的性质．解答（2）题时，主要利用“两点之间线段最短”来确定点P的位置．