四部分组成的

The pressure drop of the compound tray can be regarded as consisting of dry plate pressure drop, clear liquid resistance, liquid surface tension resistance, and packing pressure drop. The model that has established can fairly predict the pressure drop of the compound tray, the value calculated by the model compared with that detected by experiment is less than 20%.

复合塔板的压降可认为由干板压降、清液层阻力、填料层压降和克服液体表面张力的压降四部分组成，所建立的压降计算模型，能较好地预测复合塔板的压降，计算值与实验值误差在±20％以内，可用于工程设计。

The system consists of mobile pipes and pipe gate on the composition of a number of configurations, including the water hose and opening the outlet with adjustable parts, with the outlet and from the gate, pressure ring, window gates and a four-part group flashboard Cheng, gate spacing and specifications can be ditching the field and the flow configuration space.

该系统由移动管道和管道上配置的多个闸门组成，包括输水软管和开度可调节的配水口等部分，配水口又由闸口、压环、闸窗和闸板四个部分组成，闸门间距及规格可根据田间开沟间距及所需流量配置。

It includes four parts: 1 Part I, it introduces the basic knowledge of computer viruses such as computer virus definition, history and important viruses events, features, behavior phenomena, difference with computer software and hardware troubles, damage behavior and capability, classification, naming, future trend, etc; 2 Part II, it introduces the corresponding knowledge of computer systems related to computer viruses such as the composing of software and hardware of the computer system, storage media and its working mechanism, interrupt technologies,.com/.exe/.pe file formats and their working mechanism, etc; 3 Part III, it introduces computer virus mechanism and theory such as computer virus structure, work flow, working mechanism of key modules, typical technologies used to design computer viruses including the corresponding traditional technologies (interrupt filching, memory resident, etc.), the corresponding new routine technologies (self-encrypting, Mutation Engine, etc.), and the corresponding new technologies used by some prevalence computer viruses such as macro viruses, e-mail viruses, worm, hacker, Trojan, mobile phone viruses, the working mechanism analysis of some kinds of typical and prevalence computer viruses such as file-type viruses, macro viruses, e-mail viruses, worm viruses, hacker, Trojan, mobile phone viruses, the analysis of some typical and prevalence computer viruses examples including BALL viruses, WORD macro viruses, WantJob viruses, Code Red viruses, BO Trojan, etc; 4 Part IV, it introduces the defense and killing technologies of computer viruses such as the aim and criterion of computer viruses defense and killing, prevention methods and corresponding technologies, detection technologies (comparison method, character code scanning method, behavior inspecting method, analysis method, etc.), manual and automatic killing technologies, immunity technologies such as IBM digital immunity system, new anti-viruses technology trends (real-time anti-viruses technologies, 32 kernel technologies, active kernel technologies, etc.), some typical virus defense and killing softwares (Symantec AntiVirus product, PC-Cillin AntiVirus product, etc.), the defense and killing method analysis of some kinds of typical and prevalence computer viruses (file-type viruses, macro viruses, worm viruses, hacker, etc.), for example, firewall and intrusion detection technologies for anti-hacker, the defense and killing of some typical and prevalence computer viruses examples including WORD macro viruses, Code Red viruses, BO Trojan, etc.

课程内容具体包括四大部分：1）第一部分，介绍计算机病毒基本知识，包括：计算机病毒定义、病毒发展史及重大事件、病毒特点、病毒表现现象及与软硬件故障的区别、病毒破坏行为及危害性、病毒的传播途径及媒介、病毒分类、病毒的命名及计算机病毒技术发展趋势等内容；2）第二部分，介绍与计算机病毒有关的计算机系统相关知识，包括：计算机系统软硬件组成、存储介质结构及工作原理、计算机系统引导机理及流程、中断技术、。com/。exe/。pe等文件格式及工作机理等内容；3）第三部分，讲解计算机病毒机理，包括：计算机病毒的组成结构、病毒工作流程、病毒引导/触发/感染/破坏等模块的工作机理、计算机病毒所采取的编制技术（包括中断窃取/内存驻留等传统编制技术、自加密/隐形/变形机等新的常规编制技术、宏病毒/电子邮件病毒/网络蠕虫/特洛伊木马/黑客/手机病毒等一些新的流行病毒所采取的编制技术等）、一些类型的典型或流行计算机病毒的工作机理分析（包括：引导型病毒、文件型病毒、宏病毒、电子邮件病毒、蠕虫病毒、黑客、特洛伊木马、手机病毒等）、一些典型或流行的计算机病毒实例剖析（包括：小球病毒、WORD宏病毒、求职信病毒、红色代码病毒、冰河木马等）等内容；4）第四部分，讲解计算机病毒防治技术，包括：计算机病毒防治目的、病毒防治策略及规范、病毒在管理和技术上的预防措施、病毒检查技术（包括：比较法/病毒特征码扫描法/行为监测法/虚拟执行法/分析法等）、手工和自动病毒清杀技术、病毒免疫技术（包括：针对某种一次性感染病毒的基于病毒标签的免疫方法/基于自我完整性检查的计算机病毒免疫方法/IBM的数字免疫系统等）、反病毒技术的新发展（包括：实时反病毒技术/32位内核技术/主动内核技术/以毒攻毒技术等）、诺顿/趋势/金山等公司的病毒防治软件产品、一些类型的典型或流行的计算机病毒（包括：引导型病毒、文件型病毒、宏病毒、蠕虫病毒、电子邮件病毒、手机病毒、黑客、特洛伊木马）的防治措施（其中，也包括介绍面向防范黑客攻击的防火墙、入侵检测技术）、一些典型或流行的计算机病毒防治实例剖析（包括：WORD宏病毒、红色代码病毒、冰河木马v1.1/v2.2等）、多层次病毒防护体系等内容。

The article tries to study the picture reading of Chinese teaching in two aspects of theory and practice. The logical order is: the background of the question——the inevitability and feasibility of picture reading——the general plan of picture reading——the question we should pay attention to in the process of carrying out the picture reading.

本文试图从理论和实践两个层面对语文教学中的图像阅读进行研究论证，全文由四部分组成，其逻辑顺序是：问题提出的理论背景――图像阅读的必然性与可行性――图像阅读的实施运用――图像阅读实施过程中应注意的问题。

Biology having or consisting of four similar parts; tetramerous flowers.

拥有四个相同的部分或者由四个相同的部分组成；四数花。

The viewpoint must take the establishment of a better system of agriculture andlivestock sturcture as the center to do a better job in salving the problems of rural ener-gy and water and soil lose,controlling population growth,to determine the suitable-scaledevelopment plan of agricultural resources was put forwarded.

联合国粮农组织在&二十世纪末的农业&报告中提出一项由四个部分组成的世界粮食和农业战略，其中提出采取环境保护的行动是作为一项发展农业的世界性战略措施。

Mainly consists of four parts: the Department of Industrial Products: Delta Company is mainly engaged in the inverter, PLC, HITECH Man-Machine Interface, or HIWIN Luo and Yintai PMI's precision guideways, ball screws, as well as industrial control components agency work, the current company is Delta and Law Area Agent or distributors Products total distribution areas, inverter sales in more than in 6000, in addition to Deputy Cosme Liuzhou, Toshiba, Omron, Yaskawa, Mitsubishi , P + F, Schneider and other company's products, degrees to be used for textile machinery, printing and dyeing, packaging, beverage, pharmaceutical, refrigeration, elevators and other industries.

主要由四部分组成：工控产品部：主要从事台达公司的变频器、PLC、HITECH人机界面、罗升HIWIN及银泰PMI公司的精密导轨、滚珠丝杠以及工控元器件的代理工作，目前公司是台达及罗升产品华地区代理经销商地区总经销），变频器年销量在6000台以上，此外还代理科姆龙、东芝、欧姆龙、安川、三菱、P+F、施耐德等公司的产品，度要用于纺机、印染、包装、饮料、制药、制冷、电梯等行业。

There are three parts included. The first part is the prepositive-amplifier, it gets broadband high gain and flat frequency response. The second part is the U band quadrupler, which composed of two doublers using a PHEMT chip HMMC-5040, a Schottky diode of DMK-2790, a HMMC-5040 amplifier, and a fin-line transitional stage. Maximum output power higher than 60mW is obtained in V band. The third part is a 2nd harmonic gunn oscillator injection locked by the Fundamental Wave,which get about 2GHz locked bandwidth in W band.

电路主要由三部分组成，第一部分为采用HMMC-5618设计的前置放大器，实现了宽带高增益和平坦的频率响应；第二部分为设计的主体，由HMMC-5040设计的二倍频器、DMK-2790设计的二倍频器、HMMC-5040设计的放大器及鳍线过渡段组成的U波段四倍频器，在U波段实现了最高60mW以上的输出功率；第三部分为基波注入锁定谐波Gunn振荡器，在W波段实现了近2GHz锁定带宽。

The linear motion of the wire rope is rurned into the rotational movement of the puley by the sensor mountedin ffont of the drum,and the linear displacement of the wire rope is turned into pulses by the optical coupler,then thd measurment in conideration of the complexity of running tubings.

智能计量仪主要由传感器、有效计量鉴别器、分析计算系统和电源四部分组成。通过安装在滚筒前的传感器将钢丝绳的直线运动转化为摩擦轮的旋转运动，以光电转换装置将钢丝绳的线位移量转换为长度脉冲信号输送到单片机显示输出。

"Professional standards test database to run Turbine Attendant (2nd Edition) Electric Power Engineering Steam Turbine Operation and Maintenance of professional" in accordance with the Ministry of Labor and Social Security to develop national occupational standards prepared at the request, and its mainly by professional profiles, job skills training, vocational skills certification and accreditation test database composed of four parts, namely, the technical level, work environment and occupational ability characteristics of a qualitative description: the training period, teachers, site equipment and training program outline the guiding provisions.

职业标准·试题库汽轮机运行值班员(第2版)电力工程汽轮机运行与检修专业》是按照劳动和社会保障部制定国家职业标准的要求编写的，其内容主要由职业概况、职业技能培训、职业技能鉴定和鉴定试题库四部分组成，分别对技术等级、工作环境和职业能力特征进行了定性描述：对培训期限、教师、场地设备及培训计划大纲进行了指导性规定。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。