第一篇：英语作文myschool

our school is in the center city。there are six grades and thirty classes in it。the number of students is more than two thousand。we have two thousand。we have two teaching buildings ,a big library ,and a large playground there many trees and nice flowers in the school。we often keep it clean and it looks neautiful。we love our school。

My favourite person is my father.My father is a manager of a company.He always tells me to work hard in the school.After dinner,he sits at the table and reads some books.I ask him why he is so hardworking when he leave the school.Then everytime he tells me if we want to get more and more clever, we must learn more knowledge.I love my father and will also work hard.A Trip

I went hiking to a mountain with my friends last summer.It was a good trip at the beginning but something unexpected happened on the half way.One of my friends suddenly felt a terrible pain in his stomach and he couldn‘t move any further.Nobody knew what to do.One girl tried to call her mum with her mobile phone but there was no signal in the mountain area.Luckily we brought a tent with us.We put it up and let him rest in it.He took some medicine.Then he drank some water, and ate some food.After a while, he felt much better and we walked on.We all enjoyed ourselves on the top

of the mountain.、My teatherOur art teather is not too young and not too old.He has black hair two big and black eyes ,a small nose and a big mouth.Look, he is wearing a blue and white jacket ,a blue hat ,brown pants and a pair of old shoes.He is very funny.He is a good art teather.We all like him.My best friendsI have many friend.Do you know who they are?Are they my pet?No.Are they my classmates?No.Let me tell you:they are my favourit book.I like books very much.I like reading science book,cartoonbook so on.not only let me know how wonderful the word is but also teach me how to be a good person in the society,they give me great pleasure.I love books!

第二篇：myschool英语作文介绍我们的学校[范文]

小文档网文秘助手(www.teniu.cc)之my school英语作文：

介绍我们的学校

welcome to our school!our school is the key middle school in this city.now we are in the front gate.entry in this school, you can see there is a big football playground on the left and a big resturant on the right.if you’re hungry, you can have something good in there.the grand teaching building is right behind the football playground.we spend most time in the classrooms.behind the teaching building, there is a little lake with many fish in it.oh, there is also a nice library next to the lake.after the class, we can entry the library freely to read the books we like.this is our school.don’t you think it’s great?

欢迎来到我们学校!我们中学是这所城市的重点中学。现在我们来到了学校的正大门。进入到这所学校，你可以看到在校园的左边有个很大的足球场，右边有个很大的餐厅。如果你饿了，你可以去餐厅吃些好吃的东西。巨大的教学楼就在足球场后面。我们的大多数时间都待在教室里。在教学楼后面，有个小小的湖泊，很多鱼在水里游。噢，对了，小湖泊的旁边还有个图书馆。下课的时候，我们可以进去读自己喜欢的书籍。这就是我们的学校。你不认为这很棒吗?

第三篇：优化MySchool数据库设计总结

优化MySchool数据库设计总结

第一章 ：数据库设计

1，什么是数据库设计

数据库设计就是将数据库中的数据实体以及这些数据实体之间的光系，进行规划和结构化的过程。

2．数据库的设计步骤

（1）收集信息

（2）标识实体

（3）标识每个实体需要存储的详细信息

（4）标识实体之间的关系 3.绘制E-R图

实体，属性，联系，映射基数： 一对一 一对多 多对一 多对多

实体关系图 矩形表示实体集

椭圆形表示属性

菱形表示联系集

直线用来连接属性和实体集，也用来连接实体集和联系集

4.绘制数据库模型图

（1），使用pdm工具新建一个数据库模型图

（2），添加实体

（3），添加数据列及相应的属性

（4），添加实体之间的映射关系

5.规范数据库设计三大范式:（1），第一范式

（确保每列的原子性，都是不可再分的最小数据单元）

（2），第二范式

（确保表中的每列都和主键相关，并且除了主键以外其他列都依赖该主键）

（3），第三范式

（确保每列都和主键直接相关，而不是间接相关）

第二章:数据库的实现

1：

使用SQL语句创建和删除数据库

If exists(select * from sysodatabases where name=’ 数据库名’)Drop database数据库名

Create database 数据库名

On primary

(name =’

’

Filename=’

’ Size= Maxsize= Filegrowth=)Log on(name=’

’ Filename=’

‘ Size= Filegrowth=)Go 1.2 :删除数据库

Drop database 数据库名

2：

使用SQL语句创建和删除表

If exists（select * from sysobjects where name=’表名’）表名

Create table 表名

（列名 属性 非空 主键 自动增长）Go 2.2删除表 Drop table 表名

3：

使用SQL语句创建和删除约束

All table 表名

Add constraint 约束名 约束类型 具体的约束说明 1，主键约束（primary key 列名）2，非空约束（not null）3，唯一约束（unique 列名）4，检查约束（check 列名）5，默认约束（default 列名）6，外键约束（foreign key 列名）

3.2：删除约束

Alter table 表名 rop constraint 约束名

第三章：SQL编程

1.变量

1.1 局部变量声明

Declare 变量名（前面加一@符号）类型 Set.赋值变量指定的数据常量 Select.赋值一般从表中查询数据 1.2 全局变量系统自带

2.输出语句

print :输出局部变量和字符串，必须是字符串类型。

Select：一般使用在查询输出。3.数据类型转换

Cast(表达式 as 数据类型)Convert(数据类型[(长度)]，表达式[,样式])Cast()和convert()函数都可以将某种数据类型的表达式显示的转换为另一种数据类型，但是convert()函数可以通过第三个参数指定转化后的字符样式。不同的样式显示格式不同。4.逻辑控制语句

1，Begin –end 相当我们C#语言的大括号 2.if-else条件语句根据条件是否成立来确定程序的执行方向，需要与begin-end结合使用。

3.while.循环语句更具条件重复执行，一般在事情要多次执行的时候使用,break跳出循环，contiune跳过contiune后面语句，回到while第一条语句，准备下次循环。

语法： While(条件)Begin 语句块 [break,continue] End 4.case多分支语句与C#开关结构类似 语法： Case When 条件1 then 结果1 When 条件2 then 结果 2 Else 其他结果 End 第四章 ：高级查询

1．子查询

表连接查询可以代替所有的子查询，但是子查询不可以代替所有的表查询。2.in和not in子查询

使用in关键字可以使主查询匹配子查询返回多个单列值

使用not in查询取in查询相反的结果 3.exists 和not exists子查询

Exists关键字是检测子查询语句，如果子查询结果非空返回真，否则返回假。

使用Not exists 查询取exists查询相反结果。

第六章：事务，视图和索引 1.事务

事务是一种机制，一个操作序列，它包含了一组数据库操作命令，并且把所有的命令作为一个整体一起向系统提交或撤销操作请求，即这一组数据要么都执行要么都不执行。

事务四大属性 1.原子性

（事务是一个完整的操作，事务的个元素是不可在分的）

2.一致性

（当事务完成时，数据必须处于一致状态。）3.隔离性

（对数据进行操作时所有的并发事务是彼此隔离的）4.持久性

（事务成功完成后，它对于数据库的改变是永久性的。）执行事务语法

Begin transaction(标记事务起始点)Commit transaction(提交事物)Rall back transaction(回滚事务)2.视图

视图是另一种查看数据库一个表和多个表的方法，它是一种虚拟表，可以保证数据库的安全性，结果更容易理解，获得数据更容易，限制数据检索更容易，维护应用程序更方便。

创建视图

Create view 视图名称 As(select 语句)删除视图

Drop view 视图名 查看视图

Select 所需数据 from 视图名称 3.索引 3.1索引类型 1，唯一索引 2.主键索引 3.聚集索引 4.非聚集索引 5.复合索引 6.全文索引 3.2创建索引

Create [索引类型] index 索引名称 On 表名（列名）[with fillfactor=x] 3.2 使用索引查询数据 Select * from 表名 With(index =索引名称)

3.3删除索引

Drop index 表名.索引名称 3.4 查看索引

3.4.1 用系统存储过程sp-helpindex查看 Exec sp-helpindex 表名 3.4.2用视图sys_indexes Select * from sys_indexes 第七章 ：存储过程

1.存储过程的概念

存储过程是数据库管理系统中保存。预先编译的并能实现某种功能的sql程序。他是数据库中运用比较广泛的一种数据对象，存储过程可加快查询速度，提高访问数据速度，实现模块化编程，保持一致性和提高安全性。

2.用户定义存储过程

1.不带参数存储过程语法 Create procedure 存储过程名称 As Sql语句 go 1.带参数存储过程语法

Create procedure 存储过程名称 @参数1 数据类型

@参数2 数据类型 output(output关键字代表输出参数)As Sql语句 go

处理错误信息

用raiserror语句用来向用户报告错误

第四篇：2014版四年级下册第一单元myschool 第六课时

第六课时

教学目标：

1、能让学生运用This/That is „写句子。

2、能听懂录音。

3、会唱Let’s sing 的歌曲。

4、能听懂 Story time 的内容。

教具准备：教学光盘、单词卡片。

教学重点：掌握两个重点句子：“This is the library.That is the playground.”的正确书写。

教学难点：在四线格中的正确书写This is the library.playground.。

教学过程：

一、复习引题

1、日常口语交流。

2、Review：A、B两部分的词语及对话。

二、教学新课

1、让学生练习运用This/That is„练习说句子。

2、在学生能说的基础上在让学生书写这样的句子。

三、巩固练习

1、读一读并填空。

2、听录音并排序。

3、看一看并画圈。

4、唱Let’s sing 的歌曲。

5、听录音看动画理解Story time 的内容。

四、布置作业

1、唱第10页的歌曲给家长听；

2、听录音并跟读Story time。

五、教学反思：学生基本达到教学目标的要求。

That is the

第五篇：英语作文[范文]

1.The Great Wall（长城）

The Great Wall was built in ancient China.It is the world's longest human-made structure, about 6000 kilometers long.As one of the Eight Wonders in the world, the Great Wall has become the symbol of the Chinese nation(中华民族).A Chinese saying(谚语)goes like this,“ You are not a true man until you get to the Great Wall.”(不到长城非好汉)

Lots of beautiful stories about the Great Wall took place during its construction,such as Meng Jiangnu's story.Meng Jiangnu was a beautiful woman.Meng's husband was caught by government and sent to build the Great Wall.She missed her husband very much after he was taken away.she decided to set off to look for him.Unfortunately, by the time she reached the great wall, she found that her husband had already died.Hearing the bad news, she burst into tears(流泪).Her howl([haul]嚎哭)caused the collapse([kə'læps] 倒塌)of a part of the Great Wall.2.The Terracotta(['tɛrə'kɑtə]陶)Army(兵马佣)

The Terracotta Army was known as the greatest discoveries of the 20th centuries in china.It is located in Xi'an, a historical and cultural city ofNorthwest China.The Terracotta Army had lain underground for more than 2000 years before it was discovered in 1974.Itis a part of Emperor Qin Shihuang’s Mausoleum([mɔsə'liəm]陵墓).Qin Shihuang was the first emperor(['ɛmpərɚ]皇帝)of a united China.He wanted to build a special tomb to show he was the greatest emporor.So he made two million workers to dig four holes and put many statues（['stætʃu] 雕像）of soidiers,horses and war-coaches(战车)into the holes.The anciant Chinese people thought the “Army” can protect the emporor in his afterlife.（古代中国人认为那些军队可以在秦始皇死后继续保护他）

Every year,many visitors from China and other contries come to visit The Terracotta Army Museum.In 1998,the former（['fɔrmɚ]前任的）U.S.President Bill Clinton(美国前总统克林顿)together with his wife Hilary（希拉里）and daughter visited Terracotta Army Museum.Bill Clinton said he wished he could be the curator([kju'retɚ] 馆长)of the Terracotta Army Museum.（克林顿说他多么希望能是兵马俑博物馆的馆长）

3.The Four Great Inventions

As we all know,The Compass(指南针),Gunpowder(火药),Papermaking,and Printing are our Chinese great inventions.Our ancestors(['ænsɛstɚ]祖先)created them by their own mind and hand.These inventions not only have an effect on our daily life,but also contribute to the culture all aroud world.（这些发明不仅仅影响我们的日常生活，同时也对全世界作出了贡献）

But which is the most useful and practical invention to us? I think the compass is more important than the others.Because of it,we can know our country,our world.With the help of the compass, Columbus（[kə'lʌmbəs]哥伦布）found the new land.With the help of it,we know that the earth is like a ball.Having the compass,we can see the earth clearly.We can say that without the invention of the compass,there can not be a colourful world.(我们可以说没有指南针的发明，就不会有这个丰富多彩的世界)

4.Shanghai 2010 World Exposition([ekspə'ziʃən]博览会)

One year ago ,Shanghai 2010 World Expo was held in our country.The World Expo has a long history but it had never been held in a developing country（发展中国家）before.As a chinese,I felt very proud（[praud]自豪）.In my opinion, the Expo was a large and grand ceremonies.I like China Pavilion（[pə'viljən]中国馆）best.China Pavilion was designed in the style of traditional Chinese architecture（中国馆设计成传统中国建筑风格）.Ithas a

distinctive roofwhichlooks like a crown.So China Pavilion is called “oriental crown” as well.Its main colour is red which represents the spirit of Chinese culture.The theme（[θim] 主题）of the Expo was “Better City, Better Life”（城市让生活更美好）.It provided china with an important chance(它给中国提供了一个重要机遇).Great changes have taken place in china and more and more people throughout the world are focusing（focus ['fokəs] 聚焦）their attention on china now.（中国发生了巨大变化，越来越多来自世界各地的人将眼光聚焦于中国）