介绍一项发明英语作文被动结构【一】
1、时间顺序：有明确时间词。
2、空间顺序：上---下，左---右，前---后，一般适用于参观游览类或介绍事物类说明文。
3、逻辑顺序：现象---本质，主---次，远---近，简单---复杂，原因---结果。
介绍一项发明英语作文被动结构【二】
1、说明文语言的根本要求是具体，科学性（内容），准确性（语言），简练明确；文学性说明文还要求生动性、形象性。
例：①“人口剧增，资源短缺，这是当今人类面临的最严重的环境问题之一。”
第①段中加点的词“之一”能否去掉？为什么？
答：不能去掉。因为当今人类面临的最严重的环境问题，除了人口剧增，资源短缺外，还有水质污染，大气污染等，所以使用了“之一”一词，就使表达更严密、更准确。
例：②、??目前，研制一颗大型卫星的.周期为10年左右，而一颗纳米卫星的研制仅仅需要两三年即可，这样更始应快速发展的科技时代。比较文中划线句和下面的改句，哪个句子更好？
原句：而一颗纳米卫星的研制仅仅需要两三年即可。
改句：而一颗纳米卫星的研制需要两三年即可。
答：原句好，因为原句中“仅仅”一词，更进一步强调了研制一颗纳米卫星的时间短。
答题步骤：1 能否删（能否换）
2 解释词意
3 代入文本
4 删去后的影响
5 总结（体现准确性，科学性等）
介绍一项发明英语作文被动结构【三】
November **, ****
To Whom It May Concern:
This is to confirm that Mr. Li Dashui has worked as a full-time system analyst in the NY University since Jun 1994(or This letter is to verify that Mr. Li Dashui worked as an chemist from July 1993 to Sept. 1994. Mr. Lis main duties and responsibilities are as follows:
Design, develop and install various computer hardware, software and network systems for banks.
Determine and analyze the requirements of each system project into related componets solved through the application of computer technology.
Write specifications for computer programs, and test and implement programs for network systems and control systems.
Supervise computer programmers and other system analysts for paticular system projects.
Mr. Li has mainly taken part in the following projects:
The first engineering design of city general business computer network system.
Upgrading banks system for IBM AS/400 E45 to IBM AS/400 320, IBM AS/400 530.
The design development and test of city general business computer network system.
The design and development network and database systems for the Golden Credit Card Project.
Mr. Li is well experienced with IBM AS/400 system analysis, TCP/IP protocol, SNA protocol and LAN; proficient in RPGIII, VB, C/C++ and DB2, and skilled in UNIX, Informix, Client/Server etc.
Mr. Li is a hard-working and talented analyst, and is highly respected member in our company. If you need further information, please feel free to contact me. Sincerely yours, Singature, Zhang Jianguo
Senior Engineer and Technical Manage Company Name, Address, Tex Fax
介绍一项发明英语作文被动结构【四】
Dear Sir/Madam:
As a teacher at xxxx school, I am writing to provide you a recommendation for Miss/Mr.xx so as to help you assess her/his application for acceptance into your program and consideration for financial aid.
Considered a promising student with originality and sophistication in her/his thinking, (she/he was asked, in the spring semester of 2008, to develop a subsystem of a DBMS project for her B.S.thesis, for which I was the chief leader. T
his subsystem was designed to manage the information of materials in NO.1 Foundry Plant of Dongfeng Auto Works.To do the job, she/he read many books about software engineering and took some courses in Database Principles and Management. Keenly aware that the design of a DBMS decides the quality of the whole software system, she did her/his utmost from the beginning of the project.(参加过什么活动. From analyzing users requirements to designing the whole system, from the detailed designing to the final programming, she was very level-headed and full of innovation every step of the way. Taking full advantage of her ability and creativity, she firmly focused herself on her objective and gnored all distractions. She successfully reached her goal. In the final software testing, only a few bugs were found in her subsystem. My appreciation of her talelent was thus confirmed.Miss is a very personable woman, friendly and helpful, and she has always been a team player in her work.
I would greatly appreciate it if you could give her application for candidacy to your Ph.D. program favorable consideration. Should you need any further information in your deliberation, please do not hesitate to contact me.
Sincerely xxxx
