信息技术英语unit15
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2015-2-10P.1Unit 15BASIC and C Language Chapter Four&Part4 Extensive Reading@Part 1 Notes to Text
@Part5Notes to Passage& Part 2 Word Study
@Part3 Practice on Text@Part6 Practice on Passage2015-2-10P.2
@Part 1 Notes to Text
1) BASIC was developed in the early 1960s at Dartmouth College by John Keenly and Thomas Kurtz as a teaching language．BASIC最早是由约翰．凯莫尼和汤姆斯库茨于二十世纪60年代初在达特茅斯学院作为一种教学语言而开发的。
注释：达特茅斯学院成立于一七六九年的达特茅斯学院是美国第九所历史最悠久的学院。学生来自全美五十个州和全世界一百余个国家，其中亚裔学生占百分之十，黑人学生占百分之七，西裔学生占百分之五，白人学生占百分之七十五。该学院实行一种叫“达特茅斯计划”的学制，一年分四期。学生可以任选三期在校学习。这就使得许多学生可以更灵活地安排自己在校或到外校，甚或外国去短期学习的时间。这个学院的著名毕业生有编纂著名的《韦伯斯特大字典》的丹尼尔·韦伯斯特（1801），著名少儿读物丛书《苏丝博士》的作者戈色尔·苏丝（1925），美国前副总统尼尔森·洛克菲勒（1930）及几任联邦部长。
BASIC and C Language 2015-2-10P.3
2) BASIC was selected as the high-level Iangauge for such systems due to its simplicity and “compactness”in memory compared to other high-level languages．BASIC被选作这种系统的高级语言，是因为它比其它高级语言简单并“节省”内存。注释：介词短语due to its simplicity and “compactness”in memory用作原因状语；过去分次短语compared to other high-level languages是比较状语。3) A timesharing system improved not only efficiency, but also ease of using an interactive language—BASIC—that would allow each user to type programs into a terminal (similar to a personal computer) on whose screen the output would be displayed immediately. 分时系统的出现不但提高了工作效率．而且使BASIC一类交互式语言使用起来简单——即允许每位用户同时把程序输入计算机终端〔与微机类似〕，而输出则立即显示在各自的屏幕上。注释：注意that引导的从句表结果；从意义上来分析on whose screen the output would be displayed immediately则是非限制性定语从句，whose指代each user’s。2015-2-10P.4
4) ANSI developed a standard BASIC, however，most microcomputer systems use their own particular implementation of BASIC．ANSI推出了标准的BASIC。但是，大多数微机系统对BASIC有自己特殊的执行过程。注释：ANSI=American National Standards Institute 美国国家标准协会。5) C was developed by Dennis Ritchie as a systems programming language for UNIX．C语言是由Dennis Ritchie为UNIX而开发的一种系统编程语言。注释：UNIX是历史最悠久的通用操作系统。1969年，美国贝尔实验室的K.Thompson和D.M.Ritchie在规模较小及较简单的分时操作系统MULTICS的基础上开发出UNIX, 当时是在DEC的PDP-7小型计算机上实现的，1970年正式投入运行。此后数年，UNIX一直是一个限于在AT&T内部使用的操作系统。1971年，发展出以PDP-11/20汇编语言所写成的V1版，包括最基本的文件系统和一些简单的软件，之后，又经历了一些改进。Linux是一套免费使用和自由传播的类Unix操作系统，它主要用于基于Intel x86系列CPU的计算机上。这个系统是由全世界各地的成千上万的程序员设计和实现的。其目的是建立不受任何商品化软件的版权制约的、全世界都能自由使用的Unix兼容产品。2015-2-10P.5
6) PASCAL Pascal语言注释：Pascal是一种计算机通用的高级程序设计语言。它由瑞士Niklaus Wirth教授于六十年代末设计并创立。在Pascal问世以来的三十余年间，先后产生了适合于不同机型的各种各样版本。其中影响最大的莫过于Turbo Pascal系列软件。它是由美国Borland公司设计、研制的一种适用于微机的Pascal编译系统。该编译系统由1983年推出1.0版本发展到1992年推出的7.0版本，其版本不断更新，而功能更趋完善
End2015-2-10P.6End
1. acronym n. 首字母简略词11. lexically adv. 词法上2. simplicity n. 简单, 简易,12. obviate v. 消除, 排除3. compactness n. 体积小；紧密(度)13. identifier n. 标识符4. stem n. 主干14. monadic adj. 一元的5. timesharing adj. 分时的15. addict adj. 二元的6. terminal n. 终端16. composite adj. 合成的, 复合的7. enhancement n. 增强17. integer n. 整数8. dialect n. 方言18. permissive adj. 许可的9. uniformity n. 一致19. modularization n. 模块化10.implementation n. 执行
& Part 2 Word Study2015-2-10P.7
Task 1: Listening training Dictation of some key wordsDirections: You will hear some key words twice, most of which are taken from the Word Study. Then finish theCrossword Puzzle. (See you book p. )
2. Dictation of some key expressions Directions: You will hear some key expressions twice, most of which are taken from this text. Then you are asked to complete the missing words.
@Part3 Practice on Text
1) microcomputer__________2) the high-level____________3) ______________versions4) ____________of the hardware5) composite______________6) floating point____________
systemsIangaugedifferentcapabilitiessymbolsnumbers2015-2-10P.8
Read and ReplyDirections:Students are required to read aloud the whole text after the teacher. Then give short answers to the following questions:
Task 2: Read, Write and Translate
In the early 1960s at Dartmouth College.largely because microcomputer technology has advanced at a very rapid rate and the language has been changed to take advantage of the capabilities of the hardware.
Underlined characters.c) What are allowed in identifiers, which can make them more understandable?
a) When and where was BASIC developed by John Keenly and Thomas Kurtz as a teaching language?
b) Why do most microcomputer systems use their own particular implementation of BASIC?
