letters[1]

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R语言基础培训第一讲R语言入门

R语言基础培训第一讲R语言入门
> rep(1:3, times = 4, each = 2) [1] 1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3 1 1 2 2 3 3
> paste(c("X","Y"), 1:10, sep = "-") #不规则
[1] "X-1" "Y-2" "X-3" "Y-4" "X-5" "Y-6" "X-7" "Y-8" "X-9" "Y-10"
20
安装程序包的方法
1 菜单安装 在联网的条件下,按菜单栏【程序包】下拉选择【安装程序包】 ,选 择所需的程序包进行实时安装; 2 联网命令安装 例如: 要安装vegan包,在控制台中输入
install.packages("vegan") 3 本地安装 路径:Packages>install packages from local files 选择本地磁盘上存储zip包的文件夹。 4 脚本安装 在联网的条件下,请运行Rpackages.install.R程序,即可完成本培
• Examples
#举例
26
练习一 安R并导入程序包
1. 安装R和Rstudio软件、熟悉菜单 2. 本地安装程序包: vegan 3. 调用程序包,查看程序包的帮助 library(vegan) 查找vegan包中cca函数的帮助 输入 ?cca (试试"??cca") 将其中的Example粘贴到控制台中,查看运行的结果。
数据框data frame

商务英语写作教程(第三版)课件:Goodwill letters 1

商务英语写作教程(第三版)课件:Goodwill letters 1
Congratulations on making the Fortune Magazine list of Asian leaders at the forefront of change. Your impressive achievements honor the University of Washington and especially the School of Business Administration.
Dear Dr. Anderson,
I was very pleased to hear that you were promoted to be chairman of the Department of Education. Please accept my warm congratulations. For many years you have worked tirelessly for the cause of education. Your winning the position shows that your splendid service is recognized by all. I am sure that under your guidance, the school will make even greater contributions to the educational cause in future.e I wish you every success in your future career.
Campus life is different in different countries, in order to make your life more comfortable, the following I will describe some of the proposals in my school life.

Letters模板

Letters模板

Letters模板Ms. Yang:I was referred to you by Mr. Zhang, a Partner with your Beijing office, who informed me that the Shanghai office of your company is actively seeking to hire quality individuals for your Auditor Program.I have more than two years of accounting experience, including interning as an Auditor last year with the Beijing office of CCCC. I will be receiving my MBA this May from Tsinghua University. I am confident that my combination of practical work experience and solid educational experience has prepared me for making an immediate contribution to your company. I understand the level of professionalism and communication required for long-term success in the field. My background and professional approach to business will provide your office with a highly productive Auditor upon completion of your development program.I will be in the Shanghai area the week of April 16. Please call meat to arrange a convenient time when we may meet to further discuss my background in relation to your needs. I look forward to meeting you then.我是怀着十分复杂的心情写这封辞职信的。

letter的格式

letter的格式

letter的格式
书信的格式包括以下部分:
1.信头:包括发信人的地址和日期,通常位于信纸的右上
角。

2.信内地址:收信人的地址,私人信件可省去,位于信头
下两行左边。

3.称呼:位于信内地址下,根据与收信人的关系和场合使
用适当的称呼。

4.正文:位于称呼下,缩进两个字符。

正文应简洁明了,
表达清晰。

5.署名:位于正文下两行右边,可以是发信人的名字或代
称。

6.签名:位于结尾下,通常为发信人的亲笔签名。

以上是书信的基本格式,但具体的格式可能会因文化、个人习惯和书信的性质而有所不同。

Join in外研剑桥英语三年级上册Unit1-Unit3 Revision课件

Join in外研剑桥英语三年级上册Unit1-Unit3 Revision课件

______in the box? Guess.
__________? No.
__________? No.
_________? No.
____________? Great!
_______________? ___________red.
_______________? ___________563 7489.
复习目标: 能说出下列指令并作出相应动作。
※注意几组相似动作的差别。
Say “Hello”.
Stand up.
Stan down.
Slap hands.
Slap hands. Clap your hands.
Stand up.
Stand up.
Ask and answer:
注意单词的连读
5.表达自己喜欢的颜色: I like… I like… and…
I like …,… and…
注意: 如果喜欢两种或两种
以上的颜色,前面的用 逗号隔开,最后两个中 间加 and。
读的时候前面的都用 升调,最后一个用降调。
Homework: 1. 看图说话:看看自己能用到今天复习的哪些句子。
Check your answer.
Hello! Hello/Hi!
I’m Pat.What’s your name? you×
I’m Pit.
What’s this? My magic box.
What’s in the box? Guess.
A snail? No.
A skateboard? No.
A butterfly? No.
A phone? Great!
What colour is it? It’s red.

小学下册I卷英语第1单元期中试卷

小学下册I卷英语第1单元期中试卷

小学下册英语第1单元期中试卷英语试题一、综合题(本题有100小题,每小题1分,共100分.每小题不选、错误,均不给分)1.How many letters are in the English alphabet?A. 24B. 25C. 26D. 27C2.I want to ______ how to bake cookies. (learn)3.My dad loves __________ (研究历史).4.The first president of South Africa after apartheid was _______. (曼德拉)5.The symbol for indium is _____.6.The capital city of Norway is __________.7.Which animal is known for its ability to fly?A. DogB. ElephantC. BirdD. Fish8.What is the capital of Sierra Leone?A. FreetownB. BoC. KenemaD. MakeniA9.I can ______ (保持) a detailed journal.10.My friend is a _____ (志愿者) who helps others.11.My sister enjoys __________ (科学实验).12.What is the main ingredient in salad?A. PastaB. LettuceC. RiceD. Bread13.What do you call the flat surface on which a game is played?A. BoardB. FieldC. CourtD. Table14.What do we call the device used to look at distant objects?A. MicroscopeB. TelescopeC. PeriscopeD. Kaleidoscope15.What do you call a young deer?A. CalfB. FawnC. KidD. Cub16.What is the sound of a clock?A. Tick-tockB. RingC. BeepD. BuzzA17. A plateau is a flat elevated ______.18.The _______ (猴子) likes to eat bananas.19.The trees in the _______ sway in the breeze.20.The _____ (自我繁殖) helps plants spread.21.My uncle is a fantastic ____ (cook).22.What is the name of our galaxy?A. Milky WayB. AndromedaC. WhirlpoolD. Sombrero23.The chocolate is ___ (sweet/bitter).24.What do we call the hidden part of a plant that stores food?A. StemB. RootsC. LeavesD. Flowers25.The chemical formula for magnesium sulfate is ______.26.The ______ is known for her creativity.27.How many states are in the USA?A. 50B. 51C. 52D. 49A28.What is the capital of Canada?A. TorontoB. OttawaC. VancouverD. MontrealB29.My brother is a _____ (科学家) who studies animals.30.The _____ is the force that keeps planets in orbit.31.I love to eat ______ at lunchtime.32.The chemical name for HO is _______.33.I help my sister with her __________. (画画)34.My uncle is a fantastic ____ (storyteller).35.I believe that setting boundaries is important for maintaining __________.36.My ________ (玩具名称) is a soft pillow.37.What is the name of the famous scientist who developed the theory of relativity?A. Isaac NewtonB. Albert EinsteinC. Galileo GalileiD. Stephen Hawking38.The ________ (农业生态学) is essential for sustainability.39.What do we call a scientist who studies the universe?A. AstronomerB. AstrophysicistC. CosmologistD. Geologist40.Which animal says "moo"?A. DogB. CatC. CowD. SheepC41.I enjoy ________ (晨跑) in the park.42.The ________ (magnifying glass) helps me see.43.What is the name of the famous waterfall located on the border between the U.S. and Canada?A. Angel FallsB. Victoria FallsC. Niagara FallsD. Iguazu FallsC44.What is the primary source of light for our planet?A. MoonB. StarsC. SunD. Fire45.My favorite color is _______ (blue).46.My __________ (玩具名) is very __________ (形容词) and fun.47.I always help my mom clean the ________ (厨房) after dinner. It’s our little________ (家庭时间).48.I enjoy creating DIY projects at home, like __________.49.What do we call a young female goat?A. KidB. LambC. CalfD. FoalA50.The ____ has a long beak and enjoys pecking at the ground.51.I love to ___ stories. (read)52.I love the __________ (形容词) design of my __________ (玩具名).53.The ancient Romans used ________ for transportation.54.I have a _____ (小汽车) that I can race with my friends. 我有一辆可以和朋友们比赛的小汽车。

English phonetics -Unit One 英语语音第一单元

English phonetics -Unit One 英语语音第一单元

划分音节
元音是构成音节的主体,辅音是音节的分界线。 两个辅音之间不管有多少个元音,一般都是一个音节。 如bed, seat, beaut。 两个元音之间有一个辅音字母(r 除外)时,辅音 字母归后一音节,如stu’dent, la‘bour。 两个元音之间有两个辅音字母时,一个辅音归前 一音节,一个归后一音节,如let‘ter,win’ter。 不能拆分的字母组合按字母组合划分音节。如 fa‘ther,tea’cher。
英语语音
Unit One
English Basic Elementsglish letters are the writing form of English language. There are 26 letters.
Vowel letters and consonant letters 元音字母和辅音字母 Vowel letters: a e i o u (y)
10对 辅 音
[p] 清辅 音 [b] 浊辅 音
3个鼻音 3个似拼音
2个半元音
[w]
[j]
Syllable. Stress. Rhythm 音节.重音.节奏
• 音节:音节是说话时最小的语言片断, 通常是一个 元音加上一个或几个辅音字母构成, 如/sit/。但 是单独一个元音也能成为一个音节。例如:/ai/, /ә /等。辅音不响亮,不能构成音节。但英语辅音 中有4个较响亮的辅音 [m] [n][ŋ] [l],出现在词 尾,能和它前面的辅音构成一个音节。例如: /‘pju:pl/, /‘teibl/, /'bɔ:tl/ 就是双音节词。 • 单词根据所含音节数目可以分为单音节词如 ease/i:z/ 、双音节词如 easy/‘i:zi/和多音节如 uneasy/Λ n’i:zi/。

英语应用文写作Unit1 English Letters

英语应用文写作Unit1 English Letters

Samples:
Sample 1 Letter for Booking a Room
Computer Departmemt Zhuzhou College 8 August, 2012 Mr. Zhang Weihong, Manager Great Wall Hotel Beijing,100000, China Dear Sir, I would like to book a single room with bath
Yours respectfully, Wang Wei
Sample 4 Letter of Consolation
Dear k,
We are greatly shocked to learn that you are knocked down by a truck while cycling back to the campus last night. How are you feeling today? We do hope that you are doing well after the operation on your injured leg.
Your Excellency Mr. Black On the occasion of New Year, may my
wife and I extend to you and your wife our sincere greetings, wishing you a happy New Year, your career greater success and your family happiness.
We should be delighted if you could join us. I hope you will let me know that you can come.
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Dear Mr…… Thank you for your letter of ……..(date) informing of the availability of a conference room on 21 May 2002. I can confirm now the booking on this date, when about 27 of our trainees will attend the course. We shall need an OHP and a microphone for the trainer. May I know if your company can receive your usual 10% discount for this early booking? Please reply as soon as possible about my enquiry. Yours sincerely
Thank you for your telephone enquiring about rooms for a sales training course. There is a conference room available on 21 May 2002 which holds thirty people. If this is suitable, please confirm the booking in writing as soon as possible and also tell me how many trainees will attend the course. Confirming the date of the booking Telling the manager how many trainees will attend Informing him which conference equipment you will need. Asking if your company will receive its usual 10% discount.
Write a letter to Mr. Davis Telling him you cannot reduce your prices Saying why you cannot reduce your price Persuading him to reconsider your price Asking for an early reply
Write your letter to Mrs. Astbury Accepting the invitation Saying what the subject of your boss’s talk will be Saying why this subject is of interest to your boss at the moment Requesting a hotel room
Dear Mr. Davis We are so sorry to inform you that reducing the price is impossible, according to information from our sales Department. Now, cost of raw materials is rising and our quotation is the lowest price. In addition, our quality of raw materials is very competitive relative to other suppliers. So we received heavy orders. Could you reconsider our quotation and conclude the deal. Your early reply is appreciated. Yours sincerely
We ordered eight LP4 electric motors from you last month. It is now 3 June and we still have received nothing, even though you informed us that we would have the motors by 30 May. We need to know when we will receive these motors as our own work will be held up if they do not arrive within the next few days. Write a letter to Mr. Craven Apologizing for what has happened Explaining the delay Saying when you will send the motors Offering a reduction on the bill
Dear Mrs Astbury, Mr Kemp accepts your invitation and will attend the business conference. He plans to lecture on the effect of globalization on Chinese retail firms. China’s recent entry into the WTO makes this a timely topic. Mr. kemp is an expert on global trade and he has served as South Africa’s representative to the WTO. Mr. Kemp will need a hotel room, preferably a suite. More information about available accommodations would be useful.

Dear Mr. Lam, It’s great honor to learn that our product has aroused your interest. Actually, we are emerging as a rising star in the field of shirt-making. Our cooperation prospect should be promising. To show our initiative as well as goodwill, a detailed price list is enclosed. We offer a 20% discount for orders over 200 items. As your initial order of two shirts, we recommend a gray one for man and a pink one for woman respectively. Both of them are selling fast here. I look forward to serving you more in the future. Sincerely yours Thomas Hopkins
I have recently returned to Hongkong after a short holiday in England. While I was there I bought one of your shirts in London and I was so impressed with the quality that I asked and the shop for your name and address. I am interested in selling the shirts in my own shop and would probably make an initial purchase of about two shirts. I assume that there is a discount for large orders and I would be grateful if you would send me a price list with details of discounts. Write a letter to m Thanking him for his letter Saying that you are enclosing a price list Informing him what discount you can give him Telling him the colors in which the shirts are available
Yours sincerely
Telephone Message Mr. Davis called---our quotation receive, but the price is too high. Asked us to reduce by 3%. I contacted our sales Dept. was informed cost of raw materials is rising. Ours is the lowest price. Also, our quality is better and more orders are coming. Impossible to reduce.
Dr. Mr. Craven Thank you for your fax dated 3 June, informing of our LP4 electric motors. I sincerely apologize for the delay of our products, which resulted from a strike of the railway workers. I am happy to inform you that the consignment will be dispatched this Friday, 7 June. To show our goodwill, you will be offered a 5% discount. If you require more information, please do not hesitate to contact us. Thank you for your cooperation.
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