某高级中学有高一、二、三三个年级的学生共1600名，其中高三学生400名，如果通过分层抽样的方法从全体高中学生中抽取一个

B

（1）概率为：
5
55 =
1
11 ，5人中有男生
1
11 ×33=3 人，女生有
1
11 ×22=2 人；
（2）设3男生用1、2、3表示，两女生用a、b表示，从5人中取2人担任正副组长的基本事件空间为：
Ω={（1，2），（2，1），（1，3），（3，1），（1，a），（a，1），（1，b），（b，1），（2，3），（3，2），（2，a），（a，2），（2，b），（b，2），（3，a），（a，3），（3，b），（b，3），（a，b），（b，a）}，有20个基本事件．
设从5人中取2人，正组长为男生的基本事件为A，A={（1，2），（2，1），（1，3），（3，1），（1，a），（1，b），（2，3），（3，2），（2，a），（2，b），（3，a），（3，b）}共有12个基本事件
所以P（A）=
12
20 =
3
5 ；
（3）设从5人中取2人，组长至少有一个女生的基本事件为B，B={（1，a），（a，1），（1，b），（b，1），（2，a），（a，2），（2，b），（b，2），（3，a），（a，3），（3，b），（b，3），（a，b），（b，a）}共有14个基本事件所以P（B）=
14
20 =
7
10 ．

British English:中学(包括初中和高中)secondary school
American English:初中:junior high school
高中:high school

（Ⅰ）由题意得 ，则x=190；
（Ⅱ）由（Ⅰ）可得y+x=1000-（172+248）-（190+190）=200，
则应在高三年级抽取 =10（名）学生；
（Ⅲ）∵y+z=200，y≥95，z≥95，
则y≥z的概率为 ，
即高三年级中女生比男生多的概率为 。

不是,职称是需要评的

解题思路：根据要在高二女生中抽取一个人的概率，做出高二女生的人数，用所有的人数减去高一和高二的人数，得到高三共有的人数，根据要抽取的人数和总体数，求出每个个体被抽到的概率，乘以高三的人数，得到结果．

∵抽到高二年级女生的概率是0.17，
∴高二年级女生有0.17×3000=510，
∴高三年级共有3000-523-487-490-510=990，
∵对各年级用分层抽样的方法在全校抽取300名学生，
∴每个学生被抽到的概率是
300
3000＝0.1，
∴应在高三抽取0.1×990=99
故答案为：99

点评：
本题考点： 用样本的频率分布估计总体分布；分层抽样方法．

考点点评： 本题考查分层抽样方法，考查用样本的频率分布估计总体分布，本题是一个基础题，运算量不大，但是这种题目经常出现在试卷中．

One possible version
High Schools are moved from cities to the suburbs
With the development of cities and increase in the number of students, many high schools that lay in city
centres have been moved to the suburbs, thus causing a series of changes.
First, our learning and living environment has been greatly improved. The terribly noisy surrounding area
has given way to pleasantly quiet one. Also, the new schoolyard has been greatly enlarged.
Second, more school facilities have been provided, making it possible to accept more students. Besides,
the advanced equipment is highly beneficial to our all-sided development.
However, inconvenience has, meanwhile, been caused, especially traffic inconvenience. More time is
wasted on the way to and from school.
The change of school sites, I think, meets the needs for balanced education and quality education resources.
Therefore, it will surely promote the development of our education.

解题思路：（1）先根据抽到高二年级女生的概率[x/3000]=0.18得x=540．从而得出高二年级有多少名女生；
（2）根据表格可知，高三年级人数为：y+z=3000-（487+513+540+560）=900．全校要抽取300人，做出每个个体被抽到的概率，做出高三被抽到的人数．

（1）由[x/3000]=0.18得x=540．所以高二年级有540名女生．…（3分）
（2）高三年级人数为：y+z=3000-（487+513+540+560）=900．
∴[900/3000]×300=90（人）．故应在高三年级抽取90名学生．…（6分）

点评：
本题考点： 分层抽样方法；简单随机抽样．

考点点评： 本题考查等可能事件的概率，考查分层抽样，是一个统计的综合题，题目运算量不大，也没有难理解的知识点，是一个基础题．

Ladies and gentlemen, good evening. Welcome to XX senior high school second English speaking competition scene
Oral English is passed through the preliminaries and heats of layers of screening, we have chosen 15 good players for today's final. This competition will be selected to first prize of 2, 5 prize, second prize 10.
First, welcome our adjudicator spotted:...
A of adjudicator comments, I believe that this game will be more exciting and more impressive, I would like to take this opportunity wish this race has perfect success
Now is the time to performs, in order to win the game every player are carefully prepared, in addition, we also for you wonderful essays and performances, I believe we will each for their excellent performance and cheers

去该书的出版社官网上,一般都会有电子课本!

500米=50000厘米；根据比例尺的公式计算即可：比例尺=$\frac{图上距离}{实地距离}$=$\frac{1}{50000}$．
故选：C．

解题思路：在没有特殊标志的地图上，通常采用“上北下南，左西右东”进行判断方向；在有指向标的地图上，指向标的指向一般为北方；在有经纬网图的地图上，根据经纬网确定方向，经线指示南北方向，纬线指示东西方向．

本图为有指向标的地图，判读方向时，应该明确北方的位置．把指向标平移到小明家，根据指向标的箭头指向北方，相反的方向为南方，面对北方右为东左为西，小明去高级中学参加升学考试，应该先往正北走，然后再向东北走，最后再向西北走．因此判定小明行进的方向为正北→东北→西北．
故选：B．

点评：
本题考点： 在地图上表示方向的基本方法及应用．

考点点评： 考查了在有指向标的地图上判定方向的方法，属于基础题．

Dear Mom and Dad, The annual college entrance examination is around the corner.On this special occasion,how I wish I could have a heart-to-heart talk with you. I took a small vessel came to the mother's side, is entering the soul of that little in life. "It's your choice?" Angel asked, "when to give up the noble angels, and must choose when a human?" I said: "Angels do not love ... ..." As a result, I am officially in a few months to come The human world. The first is to see my father's smile, the second eye can see is her mother's tears. I grew up is very happy, a happy family and there is no shortage of what the environment. That does not mean that my family is very rich, but at least will not lack food, lack of clothing, lack of shelter, lack of playing ... ... together with a short span of seven years, our family has ushered in a small life, he was our Baby, I take great pleasure to take him! And his father, mother, my heart is the paramount family, no one more important than they are. When I grow up gradually, slowly I found that the hearts of the little devil, this is the angel who I had not been there before. But I will still only a small pressure to the devil in my heart, I really do not regret it at the time to get rid of it, it will bring the devil is not devoid of evil. For a not very wealthy families, efforts to make more money so that his wife and children has become a happier life as a husband and father. Just because the mother gave birth to his younger brother, a baby can not be separated from the mother, the family of all expenditures by the father to bear, which simply made him more important responsibilities, he had to make more efforts to more to fight. But every one can not imagine that the father's and mother's efforts are mostly concentrated in the maternal newborn infants who, before the seven or eight-year-old physical restraint in reducing cases of depression could finally broke the hearts of the devil Out, he is a little bit of soul to the devil by corrosion of ... ... This led to the life of degradation for the first time. It taught me the devil to steal home for the first time take a few dollars, was found not only for the devil is a better corrosion space, the body has begun to learn to look strange smile. Then after time, to see the case of money has become a matter of course, which has long been his hands dirty, too dirty cause vomiting. In the evolution of things, finally know the parents of the children wrong. A theft, was caught by his father, the father of dyspnea with sticks and severely weak and the smoking body, all of a sudden, the Devil injured, was wounded by an angel of goodness, I cried, really very sad to cry, Naqi Dao Cijin even have their own ideas chest. But I can not do, my mother gently kissed his forehead asked me where it hurt? There hurt? Two large tears from my eyes get out, drop in the hands, feet, which also includes mother's tears, at this moment, the pain is not physical, but the heart. In this way, the image of his father's dignity in my heart to put up high, and this is what I have seen my father, a strong but not vulnerable to those who show up at the same time, this is the first time I learned that the two different Love, and everyone will love these two grow up. My father's sense of dignity in which gradually became a long-term fear, I fear the angry father, I fear even more afraid of criticizing his father's father's "love of education." This is so my young mind gradually dare to talk about his father's deep heart, what has been contradictory, just look for essentially telling the mother or suppressed in their hearts that this form of a illness, the devil is left behind The curse: the family-autistic. I get in front of parents say that they rarely talk about things, even when guests come, as a result of fear and dare not say something wrong and talk to people. If you continue along this way, I may be able to gradually erase the curse of the devil. But it seems that my idea was too naive, and the devil's curse is also an extension, it has not gone the power. I found the weak ignorance of the circle, which is a very beautiful face of tremendous flowers. This is my circle of the preliminary understanding that it is very beautiful, but still surrounding the release of dangerous thickness and dense atmosphere. I fled! The devil was filthy, I was no longer an angel! My character, a number of interests at the same time also been distorted, I can not believe the change was so obvious that I was afraid of their own, not dare to face reality, for example, will introduce legislation in their own distorted mirror in front of the plane into a mirror ball , Which have seen their own has become abstract, it is no longer true to. I smiled again as strange demonic smile. I am irrational with the blessing of the devil once again extend my hands of the evil, this time, I have the soul of a more dirty, the corrosion has been almost the same, I almost let himself fall. When I became almost the devil's food, almost the devil in order to be able to victory in the revival of the gesture, my father, a great saint again, then he will be tough stance against one's demons, I will The soul from darkness to save, this time with holy water for my father wash the dirty hands, make up the Word with me was the soul of corrosion, Youku I, with my father's tears and holy water to wash the soul I like to start again angelic wings. This time, the devil lost, it disappeared with a curse.Dad, Mom. I love you, I am willing to let the seven-color flowers Saman our home, so that the seeds of love continues, we must ... ... 7

my school was determined by jiangsu province as the first batch of key middle schools,whiich is a senior middle school.

（1） 人；
（2）高三年级人数为 y ＋ z ＝2000－（373＋377＋380＋370）＝500，
现用分层抽样的方法在全校抽取48名学生，应在高三年级抽取的人数为：
名

解题思路：地图上的方向有不同的表示方式．在有指向标的地图上，用指向标指示方向，指向标箭头的指向一般为北向；在有经纬网的地图上，用经纬网定向，纬线指示东西方向，经线指示南北方向；没有指向标与经纬网的地图，通常采用“上北下南，左西右东”的规定确定方向．

在有指向标的地图上，用指向标指示方向，指向标箭头的指向一般为北向；把指向标平移到小明家，根据指向标的箭头指向北方，相反的方向为南方，面对北方右为东左为西，小明去高级中学参加升学考试，应该先往正北走，然后再向东北走，最后再向西北走．因此判定小明行进的方向为正北→东北→西北．
故选：B．

点评：
本题考点： 在地图上表示方向的基本方法及应用．

考点点评： 考查了在有指向标的地图上判定方向的方法，属于基础题．

（1）高二有510个女生；
（2）应在高三抽取99人。

（1）
（2）高三人数y+z=3000-（523+487+490+510）=990
所以应在高三抽取： 人
答：（1）高二有510个女生；
（2）应在高三抽取99人。

（1）由
x
3000 =0.18得x=540．所以高二年级有540名女生．…（3分）
（2）高三年级人数为：y+z=3000-（487+513+540+560）=900．
∴
900
3000 ×300=90（人）．故应在高三年级抽取90名学生．…（6分）

这样想吧：1. 100-21=79 2. 67+45=112 3. 112-79=33 思路：首先算出学音乐和绘画的总共有79人。再用绘画人数和音乐总人数减去79就得出了。呵呵。你仔细想想吧。你很吝啬，分都不给!

Honorary certificate
xxx At first,won the first prize in the composition contest.
Administ,as a little encouragement
XX Senior high school
December 2008

城基的试卷拿不到,其余的到朝霞书店买就有,有08~10的卷

解题思路：（1）先根据抽到高二年级女生的概率是0.19，求出高二女生的人数，可求出x值，
（2）再用全校的人数减去高一和高二的人数，得到高三的人数，全校要抽取48人，做出每个个体被抽到的概率，做出高三被抽到的人数．
（3）设出高三年级女生比男生多的事件为A，高三年级女生，男生数记为（y，z），因为y+z=500，且y，z∈N，列举出基本事件空间包含的基本事件有共11个，事件A包含的基本事件数，得到结果．

（1）∵x2000=0.19，∴x=380（2）高三年级人数为y+z=2000-（373+377+380+370）=500现用分层抽样的方法在全校抽取48名学生，应在高三年级抽取的人数为482000×500=12（名）．（2）设高三年级女生不比男生多的事件为A...

点评：
本题考点： 列举法计算基本事件数及事件发生的概率；分层抽样方法．

考点点评： 本题考查等可能事件的概率，考查分层抽样，是一个统计的综合题，题目运算量不大，也没有难理解的知识点，是一个基础题．

1.015071
2.由题可知,猫跑1步路程老鼠要跑5步,所以猫与鼠的速度比是15：4,11/（15-4）=1,1*15=15米.

Recently , I have just turned to a high school in a city. I met lots of problems in this new situation and I hope that I can get some advice from you.
that I can get some advice from you也可以这么表达： that you can kindly give me some advice

你好,以下是比较专业的推荐信写法：
Recommendation Letter
To whom it may concern,
XXX is a student in Guangzhou Dong Pu High School, which is one of the provincial first-class high schools. During his study period here, he respects his teachers and is deeply concerned with his classmates; he studies very hard and is good at thinking, and moreover, he is assiduous in study; he always gets good grades and has plenty of push; he is steady and can stand on his own feet; he is also a self-determinated student and active in group activities, who has the unity consciousness and team spirit. He has unlimited potential and tenacity, which will definitely lead him to success in your school too. I recommend him as a good candidate and hope you can approve my recommendation.
Recommender: XXX
Title: Middle-level Political Teacher and Class Adviser in Dong Pu High School
mm/dd/yyyy

解题思路：由题意知，本题是一个古典概型，试验发生包含的事件是从10名学生中选3名，而满足条件的事件是恰好选到2女1男，利用组合数表示出事件的个数，代入概率公式得到结果．

由题意知，本题是一个古典概型，
试验发生包含的事件是从10名学生中选3名，共有C₁₀³=120种结果，
而满足条件的事件是恰好选到2女1男，共有C₆²C₄¹=60种结果，
根据古典概型概率公式得到P=[60/120]=[1/2]
故答案为：[1/2]

点评：
本题考点： 古典概型及其概率计算公式；计数原理的应用．

考点点评： 本题主要考查古典概型，解决古典概型问题时最有效的工具是列举，大纲中要求能通过列举解决古典概型问题，也有一些题目需要借助于排列组合来计数．

教师资格证
Certificate of Qualication高级中学教师资格证 the Qualification Certificate For Senior High School Teachers

NO.1 Senior Middle School of Chengyan District Qidao City

配套练习册的封面也是绿色的啊.我昨天才买过~~
中国地图出版社
28块（含地图册） 在广东路河南中路路口往西 广东路310号