2002年广州市初中信息技术考试题(笔试)

一、选择题 1.计算机存储容量的大小以字节B为单位.1KB等于( )。 A 1000B B.1024B C.1000×1000B D.1024×1024B 2下列设备中属于输出设备的是( )。 A.绘图仪 B.扫描仪 c数码相机 D.键盘 3.CP[j包括了( )。 A控制器和运算器 B.控制器和内存 c运算器和内存 D.主机和内存 4.下列软件中.属于系统软件的是( )。 A.WPS B.PowerPoi n1 C W_『ldows D ExceI 5.下列描述中不正确的是( )。 A.计算机的内存储器可分为ROM和RAM两部分 B随机存储器用ROM表示,只读存储器用RAM表示 C只读存储器的内容在停电后不会丢失 D.随机存储器既可…     

Excel工作经验小汇

一、怎样保护表格中的数据假设要实现如图1所示的功能,要求在合计项和小计项不能输入数据,由公式自动计算。首先,按图中输入文字及数字,在合计项F4至F7单元格中依次输入公式:=SUM(B4:E4)、=SUM(B5:E5)、=SUM(B6:E6)、=SUM(B7:E7);在小计项B8至F8单元格中依次输入公式:=SUM(B4:B7)、=SUM(C4:C7)、=SUM(D4:D7)、=SUM(E4:E7)、=SUM(F4:F7)。在默认情况下,整个     

一级笔试样卷(Windows环境)

(考试时间90分钟,满分100分)一、选择题1～30题每题1分,31～55题每题2分,共80分.在下列各题的A)、B)、C)、D)四个选项中,只有一个选项是正确的,请将正确选项涂写在答题卡相应位置上.答在试卷上不得分.1.微型计算机中,运算器、控制器和内存储器的总称是A)主机 B)MPU C)CPU D)ALU2.微型计算机中,ROM是A)顺序存储器 B)只读存储器C)随机存储器 D)高速缓冲存储器3.下列设备中,只能作输出设备的是A)磁盘存储器 B)键盘 C鼠标器 D)打印机4.微型计算机中,存储数据的最小单位是     

关于丢番图方程P2z-PzDm+D2m=X2(I)

设P为素数,P鄹D>1,完全解决丢番图方程A:P2z-PzDm D2=X2。得到如下结论:(Ⅰ)若P=2,则方程(A)除D=3仅有非负整数解26-23·3 32=72和D=3·22k-4 2k-1-1(k≥3)仅有非负整数解22k-2k·(3·22k-4 2k-1-1) (3·22k-4 2k-1-1)2=(3·22k-4 1)2以及D=22k-4 2k-1-3(k≥3)仅有非负整数解22k-2k·(22k-4 2k-1-3) (22k-4 2k-1-3)2=(22k-4 3)2之外,无其他非负整数解。(Ⅱ)若P=3,则方程(A)除D=32k 1 2·3k-14(k≥1)仅有非负整数解32k-3k·32k 1 2·3k-14 (32k 1 2·3k-14)2=32k 1 14 2之外,无其他非负整数解。(Ⅲ)若P>3为奇素数熏则方程(A)除D=3P2k 2Pk-34(k≥1)仅有非负整数解P2k-Pk·P2k 2Pk-34 (P2k 2Pk-34)2=3P2k 14 2和D=P2k 2Pk-34(k≥1)仅有非负整数解P2k-Pk·P2k 2Pk-3 (P2k 2Pk-3)2=P2k 3 2之外,无其他非负整数解。     

宁康霉素对植物病原真菌的抑制作用

宁康霉素是由海洋细菌BAC-9912发酵获得的生物农药,对多种植物病原真菌有良好的抑制作用。本研究发现宁康霉素强烈抑制玉米纹枯病菌和苹果轮纹病菌的菌丝,可使玉米纹枯病菌菌丝枯萎和产生畸形。比较宁康霉素与农利灵和速克灵对玉米纹枯病菌的抑菌效果,结果显示宁康霉素的抑菌效果优于两种化学农药。     

上海市计算机应用能力考核(初级)试题详解

基本知识1．正确答案：D，解答；／P表示分屏显示；／W表示以紧缩形式显示文件清单。2．正确答案：B，解答：见教材P2）3o3‘正确答案：C，解答：见教材P．148中间的这张图。4．正确答案：B，解答：见教材P．互。5．正确答案：A解答：尼教材PS。6．正确答案：C，解答：文件主名是由三一8个字符组成，扩展名可以有1～3个字符。7正确答案：B，解答：F。XBASE的程序有3种结构：顺序、分支、选择。8．正确答案：C，解答：见教材P、11第五五行至第18行。9．正确答案：D，解答：见教材P6o10．正确答案：D，解答：在文件名中引入“？”和…     

一种简便的胨冻样芽孢杆菌(Bacillus mucilaginosus)定向驯育及保藏方法

初步建立起一种提高胨冻样芽孢杆菌定植能力的驯化方法。胨冻样芽孢杆菌XDB1菌株经未灭菌的自然土壤驯化四个月后,在硅酸盐细菌分离培养基上培养3天,菌落平均直径从7.82mm增加到11.80mm,方差分析差异达到极显著水平;D4B1菌株驯化后,菌落平均直径从7.17mm增加到15.63mm,方差分析差异也达到极显著水平。实验表明胨冻样芽孢杆菌在灭菌自然土壤中繁殖能力很好,可以将灭菌土壤作为保存胨冻样芽孢杆菌的基质。     

胨冻样芽孢杆菌(Bacillus mucilaginosus YNUCC0001)絮凝剂生产、絮凝特性及其系统发育学分析

对BacillusmucilaginosusYNUCC000116SrDNA的1481bp片段与GenBank中最相似的16个分类单位进行了比较。UPGMA,NJ,ME和MP方法构建的系统发育树显示B.mucilaginosusYNUCC0001与B.mucilaginosusHSCC1605T、B.mucilaginosus1480D及Paenibacillussp.NBT形成一个单系群分支。在50L全自动发酵罐中30℃发酵52h后,菌株YNUCC0001产生的胞外生物多聚絮凝剂(EBF)达到最大产率(粘度:3420C.P.)。在pH4.0、用量为0.25mlL-1的条件下,这种EBF对高岭土悬浊液的絮凝活性最大(99.8%);121℃高压灭菌60min后絮凝活性维持在98.6%。Hg2 ,Ca2 ,Mg2 ,K ,Zn2 对其絮凝活性有促进作用,而Fe3 、Al3 、EDTA和Cu2 则有强烈抑制。     

全国计算机等级考试二级笔试样卷(基础知识和FoxBASE程序设计)

一、选择题1-40题每题1分,41-50题每题2分,共60分.在下列各题的A)、B)、C)、D)四个选项中,只有一个选项是正确的,请将正确选项涂写在答题卡相应位置上,答在试卷上不得分.1.一个完整的计算机系统包括A)主机与外部设备 B)主机与操作系统C)硬件系统与软件系统 D)CPU、存储器与外部设备2.与十进制数96等值的二进制数是A)01100000 B)10010110 C)01100001 D)011000113.存储器按字节进行编址,若某存储器芯片共有10根地址线的引脚,则该存储器芯片的存储容量为A)512B B)1KB C)2KB D)4KB4.WPS字处理软件属于     

金属氧化物气敏传感器(I)

本书系西安电子科技大学徐毓龙教授与亚琛工大(德)D.Kohl和G.Heiland两教授合作,执笔写成的Metal oxide Gas Sensors专著,经对方授意,由徐编译成的连续性中文稿.计六章:(1)导论;(2)金属氧化物点缺陷理论;(3)重要金属氧化物的性质;(4)金属氧化物的表面性质和表面过程;(5)金属氧化物气敏传感器举例;(6)结论和展望,拟分6期刊完.今在该书出版之前,作先导刊出,以飨读者.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

Explanation and prediction: an architecture for default and abductive reasoning

Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.     

Three Process Perspectives: Organizations, Teams, and People

This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)^SM and Team Software Process (TSP){^SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.     

基于复小波噪声方差显著修正的SAR图像去噪

提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。     

How do children do mathematics with LOGO?

Abstract  This paper considers some results of a study designed to investigate the kinds of mathematical activity undertaken by children (aged between 8 and 11) as they learned to program in LOGO. A model of learning modes is proposed, which attempts to describe the ways in which children used and acquired understanding of the programming/mathematical concepts involved. The remainder of the paper is concerned with discussing the validity and limitations of the model, and its implications for further research and curriculum development.