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单片机课后习题答案《单片机应用技术》C语言版.doc

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promotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming majority of the people, maximize factors, enhance social development, improving social governance, the interests of national security, ensure that the people live and work, social stability and order. o improve social governance, stimulating social organization, innovative and effective system of preventing and resolving social conflicts, improving the public security system, set up the National Security Council, national security systems and national security strategy to ensure national security. Plenary session, the construction of ecological civilization, you must establish systems of ecological system, using the system to protect the ecological environment. o improve naturalresources asset property right system and use control, red line of delimitation of ecological protection, resources paid use system and ecological compensation system in ecological environment protection management system reform. Plenary session, centering on building a listening party command, can win and having a fine style of the people's army, a strong army under the new situation of the party Goals, restricting the development of national defense and army building is solved outstanding contradictions and problems, innovation and development of military theory, enhance military strategic guidance, improve the military strategy in the new period, building a modern military force system with Chinese characteristics. o deepen the adjustment of personnel system reform in the army, military policy and system reform, promote the development of military and civilian integration depth. Plenary session stressed that comprehensive reform must be to strengthen and improve theparty's leadership, give full play to the core role of the party commands the overall situation and coordinating all parties, improving the party's leading water ... Margin. Challenged the leadership of the Communist Party of China, Marxism-Leninism and Mao Zedong thought by Deng Xiao-ping's flag, replaced by three representatives and the harmonic society. The former Communist Party spirit and social cohesion point of almost all political makeover. Characteristics of socialism public ownership is shifting to private ownership, planned regulation and market regulation, the proletarian regime controlled by the elite. Of universal equality, fairness nd basic principles of distribution system is socialist society, however after economic monopolized by powerful, vested interests growemployers do not have the same status, hardly seems fair social distribution. State key protection of capital interests rather than the interests of citizens, had been hits the bottom of the proletariat 习题1答案 1, 什么是单片机 答:单片微型计算机是指集成在一个芯片上的微型计算机,它的各种功能部件,包括CPU(Central Processing Unit)、随机存取存储器RAM(Random Access Memory)、只读存储器ROM(Read-only Memory)、基本输入/输出(Input/Output,简称I/O)接口电路、定时器/计数器等都制作在一块集成芯片上,构成一个完整的微型计算机,可以实现微型计算机的基本功能。 单片机应用系统是以单片机为核心,配以输入、输出、显示、控制等外围电路和软件,能实现一种或多种功能的实用系统。 单片机应用系统是由硬件和软件组成的,硬件是应用系统的基础,软件则是在硬件的基础上对其资源进行合理调配和使用,从而完成应用系统所要求的任务,二者相互依赖,缺一不可。 2、p3口 第二功能 答:P3口各引脚与第二功能表 引脚 第二功能 信号名称 P3.0 RXD 串行数据接收 P3.1 TXD 串行数据发送 P3.2 外部中断0申请 P3.3 外部中断1申请 P3.4 T0 定时/计数器0的外部输入 P3.5 T1 定时/计数器1的外部输入 P3.6 外部RAM写选通 P3.7 外部RAM读选通 习题2答 案 2.2什么是单片机开发系统,由哪些设备组成 答: 单片机开发过程所用的设备与软件称为单片机开发系统或开发工具。 单片机开发系统包括计算机、单片机在线仿真器、开发工具软件、编程器等。连接方法如下图所示。 单片机开发系统连接方法示意图 2.单片机应用系统的开发过程如下: 设计电路图→制作电路板→程序设计→硬软件联调→程序下载→产品测试 2.4 具有那些基本功能 答:1.在线仿真功能 在线仿真器(In Circuit Emulator,简称ICE)是由一系列硬件构成的设备,它能仿真用户系统中的单片机,并能模拟用户系统的ROM、RAM和I/O口。因此,在线仿真状态下,用户系统的运行环境和脱机运行的环境完全“逼真”。 2.调试功能 1) 运行控制功能 Obviously, face China's Socialist system, the Communist Party is not the party. In that case, political chaos has been very tight. Is remodeling or reconstruction, is a correction or a stove. Whether to turn right or left, is back to the source or put forward new political ideas. This is to determine the road problems in China, is also the key out of the deep water of the reform of the economic system. After 18, the new Central collective leadership attaches great importance to political orientation. First, the \cles\ng point, starting from the Central Government's self-restraint, which preaches and pro-image, brought fresh feeling to the community. Secondly, before reform and opening up and reform and opening two periods after non-negative, untying the tangle of the society a long time on this issue. Third, a new generation of party leaders on various occasions to Mao Ze-Dong and Mao Ze-Dong's thought of evaluation has room for manoeuvre, through to the ruling ideology of Mao Zedong thought, is the call of the soul to the Socialist Revolution and construction. Empty talks jeopardize national interests and try again, is an affirmation of Deng Xiao-ping's reform ideas. These strong political signal showing a new generation of political leaders is still keeping to the Socialist road. Four is revisiting the \o Ze-Dong's historical cycle of\ofile anti-corruption and the importance of the Constitution, reorganization is bad style of officialdom, was to civilize people obey the law, while improving the color change of the regime of vigilance. Five is to reform into deeper waters and stressed that top-level design, this is a review on the reform and opening up in the past, is also looking for a way out. Six foreign and Russia closer, the flexible attitude on the issue of the Korean peninsula, Sino-Japanese fishing hardline China on the island out of the \nt\ow profile shadow began to gradually plan development. Signs show that the new leadership began to make a left turn in politics. However, as of right now, not only ideological confusion in the community, the new leadership's thinking is messy. New leaders both stressed the need to implement the Constitution, stressed the need to turn off the power in a cage. Also stresses that Mao Zedong thought cannot be lost, 30 years after the reform and opening up 30 years ago can not deny each other. Both advocate democracy and release \n does not speak of\cal constraints. Neither deny the history of the CPC Central Committee on several issues ...Comrades: today brings together members, mainly in order to provide a platform to Exchange and learn from each other in order to facilitate our work. Just now, we focus on taxation, planning and stability, safety, project construction, typical topics such as private facts presentation and interaction, and towns currently exist in the in-depth analysis of the problems to be solved, to explore new methods to solve the problem. It can be said that summing up the achievement, no grandstanding; analysispromotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming majority of the people, maximize factors, enhance social development, improving social governance, the interests of national security, ensure that the people live and work, social stability and order. o improve social governance, stimulating social organization, innovative and effective system of preventing and resolving social conflicts, improving the public security system, set up the National Security Council, national security systems and national security strategy to ensure national security. Plenary session, the construction of ecological civilization, you must establish systems of ecological system, using the system to protect the ecological environment. o improve naturalresources asset property right system and use control, red line of delimitation of ecological protection, resources paid use system and ecological compensation system in ecological environment protection management system reform. Plenary session, centering on building a listening party command, can win and having a fine style of the people's army, a strong army under the new situation of the party Goals, restricting the development of national defense and army building is solved outstanding contradictions and problems, innovation and development of military theory, enhance military strategic guidance, improve the military strategy in the new period, building a modern military force system with Chinese characteristics. o deepen the adjustment of personnel system reform in the army, military policy and system reform, promote the development of military and civilian integration depth. Plenary session stressed that comprehensive reform must be to strengthen and improve theparty's leadership, give full play to the core role of the party commands the overall situation and coordinating all parties, improving the party's leading water ... Margin. Challenged the leadership of the Communist Party of China, Marxism-Leninism and Mao Zedong thought by Deng Xiao-ping's flag, replaced by three representatives and the harmonic society. The former Communist Party spirit and social cohesion point of almost all political makeover. Characteristics of socialism public ownership is shifting to private ownership, planned regulation and market regulation, the proletarian regime controlled by the elite. Of universal equality, fairness and basic principles of distribution system is socialist society, however after economic monopolized by powerful, vested interests growemployers do not have the same status, hardly seems fair social distribution. State key protection of capital interests rather than the interests of citizens, had been hits the bottom of the proletariat 开发系统应能使用户有效地控制目标程序的运行,以便检查程序运行的结果,对存在的硬件故障和软件错误进行定位。

2) 单片机状态查看修改功能

当CPU停止执行程序运行后,开发系统允许用户方便地读出或修改目标系统资源的状态,以便检查程序运行的结果、设置断点条件以及设置程序的初始参数。任务2中图2.13给出了在Medwin调试环境下查看单片机内部资源的菜单。

3.程序编译功能 1) 程序设计语言

单片机程序设计语言包括机器语言、汇编语言和高级语言。 机器语言是单片机唯一能够识别的语言。

汇编语言具有使用灵活、实时性好的特点。目前,在实际项目开发中较少使用汇编语言。

高级语言通用性好,且具有较好的可读性和可移植性,是目前单片机编程语言的主流。

2) 程序编译

单片机开发系统能够提供源程序的编辑、编译和下载功能以及工程管理功能。

4.程序固化功能

编程器是完成这种任务的专用设备,它也是单片机开发系统的重要组成部分。

习题4 答案

4.单片机定时/计数器的定时功能和计数有何不同

答:当定时/计数器设置为定时工作方式时,计数器对内部机器周期计数,每过一个机器周期,计数器增1,直至计满溢出。定时器的定时时间与系统的振荡频率紧密相关,如果单片机系统采用12M晶振,则计数周期为:,这是最短

的定时周期,适当选择定时器的初值可获取各种定时时间。

当定时/计数器设置为计数工作方式时,计数器对来自输入引脚T0(P3.4)和T1(P3.5)的外部信号计数,外部脉冲的下降沿将触发计数,检测一个由1到0的负跳变需要两个机器周期,所以,最高检测频率为振荡频率的1/24。计数器对外部输入信号的占空比没有特别的限制,但必须保证输入信号的高电平与低电平的持续时间在一个机器周期以上。

当需要准确计算时间时往往采用定时器的定时方式,而当要对一些外部事件计数时则采用定时器的计数方式。

4.软件定时和硬件定时的原理

答:软件定时是通过编写一段延时程序来实现定时,这段延时程序不完成任何操作,只是通过一些空操作浪费掉一段时间。这样的软件定时往往浪费CPU的工作效率,并且定时不够准确,前面三章的各个任务中均采用了这种方法。

硬件定时是通过单片机的定时器来实现时间的计算,用户只需要对定时器的工作方式、初始值赋予合适的数值,启动定时器后,定时器将自动按照机器周期定时。这种由定时器实现的定时方式,定时时间准确、CPU的工作效率高。

4.5单片机的定时/计数器是增1计数器还是减一计数器 答:

Obviously, face China's Socialist system, the Communist Party is not the party. In that case, political chaos has been very tight. Is remodeling or reconstruction, is a correction or a stove. Whether to turn right or left, is back to the source or put forward new political ideas. This is to determine the road problems in China, is also the key out of the deep water of the reform of the economic system. After 18, the new Central collective leadership attaches great importance to political orientation. First, the \cles\ng point, starting from the Central Government's self-restraint, which preaches and pro-image, brought fresh feeling to the community. Secondly, before reform and opening up and reform and opening two periods after non-negative, untying the tangle of the society a long time on this issue. Third, a new generation of party leaders on various occasions to Mao Ze-Dong and Mao Ze-Dong's thought of evaluation has room for manoeuvre, through to the ruling ideology of Mao Zedong thought, is the call of the soul to the Socialist Revolution and construction. Empty talks jeopardize national interests and try again, is an affirmation of Deng Xiao-ping's reform ideas. These strong political signal showing a new generation of political leaders is still keeping to the Socialist road. Four is revisiting the \o Ze-Dong's historical cycle of\ofile anti-corruption and the importance of the Constitution, reorganization is bad style of officialdom, was to civilize people obey the law, while improving the color change of the regime of vigilance. Five is to reform into deeper waters and stressed that top-level design, this is a review on the reform and opening up in the past, is also looking for a way out. Six foreign and Russia closer, the flexible attitude on the issue of the Korean peninsula, Sino-Japanese fishing hardline China on the island out of the \nt\ow profile shadow began to gradually plan development. Signs show that the new leadership began to make a left turn in politics. However, as of right now, not only ideological confusion in the community, the new leadership's thinking is messy. New leaders both stressed the need to implement the Constitution, stressed the need to turn off the power in a cage. Also stresses that Mao Zedong thought cannot be lost, 30 years after the reform and opening up 30 years ago can not deny each other. Both advocate democracy and release \n does not speak of\cal constraints. Neither deny the history of the CPC Central Committee on several issues ...Comrades: today brings together members, mainly in order to provide a platform to Exchange and learn from each other in order to facilitate our work. Just now, we focus on taxation, planning and stability, safety, project construction, typical topics such as private facts presentation and interaction, and towns currently exist in the in-depth analysis of the problems to be solved, to explore new methods to solve the problem. It can be said that summing up the achievement, no grandstanding; analysispromotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming majority of the people, maximize factors, enhance social development, improving social governance, the interests of national security, ensure that the people live and work, social stability and order. o improve social governance, stimulating social organization, innovative and effective system of preventing and resolving social conflicts, improving the public security system, set up the National Security Council, national security systems and national security strategy to ensure national security. Plenary session, the construction of ecological civilization, you must establish systems of ecological system, using the system to protect the ecological environment. o improve naturalresources asset property right system and use control, red line of delimitation of ecological protection, resources paid use system and ecological compensation system in ecological environment protection management system reform. Plenary session, centering on building a listening party command, can win and having a fine style of the people's army, a strong army under the new situation of the party Goals, restricting the development of national defense and army building is solved outstanding contradictions and problems, innovation and development of military theory, enhance military strategic guidance, improve the military strategy in the new period, building a modern military force system with Chinese characteristics. o deepen the adjustment of personnel system reform in the army, military policy and system reform, promote the development of military and civilian integration depth. Plenary session stressed that comprehensive reform must be to strengthen and improve theparty's leadership, give full play to the core role of the party commands the overall situation and coordinating all parties, improving the party's leading water ... Margin. Challenged the leadership of the Communist Party of China, Marxism-Leninism and Mao Zedong thought by Deng Xiao-ping's flag, replaced by three representatives and the harmonic society. The former Communist Party spirit and social cohesion point of almost all political makeover. Characteristics of socialism public ownership is shifting to private ownership, planned regulation and market regulation, the proletarian regime controlled by the elite. Of universal equality, fairness and basic principles of distribution system is socialist society, however after economic monopolized by powerful, vested interests growemployers do not have the same status, hardly seems fair social distribution. State key protection of capital interests rather than the interests of citizens, had been hits the bottom of the proletariat MCS-51系列单片机的定时/计数器是增1计数器。 对于增1计数器,计数初值应等于最大计数值减去所需要的计数值。 而减1计数器,计数初值就等于所需要的计数值。 例如:假设需要计数50000次。对于增1计数器的单片机,若采用方式1的定时器,最大计数值为65536,则初值应为:65536-50000=15536。 而对于减1计数器,则计数初值将为50000。 1,当定时计数器在工作方式一,晶振平率为6赫兹 答: 在定时/计数器工作于方式1下,最大计数值为65536。 若晶振频率为6MHz,则一个机器周期为2μS,所以最短定时时间为2μS(计数初值为65535),最长定时时间为2μS×65536=μS(计数初值为0) 4单片机定时计数器4种工作方式的特点 答: 定时/计数器的4种工作方式由方式寄存器TMOD中的M1、M0来进行选择,具体如下: M1 M0 工 作 方 式 功 能 说 明 0 0 方 式 0 13位计数器 0 1 方 式 1 16位计数器 1 0 方 式 2 自动再装入8位计数器 1 1 方 式 3 定时器0:分成两个8位计数器 定时器1:停止计数 4.8什么是中断 特点是什么 答: 中断是通过硬件来改变CPU的运行方向。计算机在执行程序的过程中,当出现CPU以外的某种情况,由服务对象向CPU发出中断请求信号,要求CPU暂时中断当前程序的执行而转去执行相应的处理程序,待处理程序执行完毕后,再继续执行原来被中断的程序。这种程序在执行过程中由于外界的原因而被中间打断的情况称为“中断”。 调用中断服务程序的过程类似于调用子程序,其区别在于调用子程序在程序中是事先安排好的;而何时调用中断服务程序事先却无法确定,因为“中断”的发生是由外部因素决定的,程序中无法事先安排调用指令,因此,调用中断服务程序的过程是由硬件自动完成的。 中断的特点:分时操作、实时处理、故障处理 4.9 单片机有哪几个中断源 答: MCS-51系列单片机有5个中断源,分别是外部中断0、定时器0、外部中断1、定时器1、串行口。它们的优先级别通过寄存器IP实现。 4.外部中断有哪两种触法方式 答: 外部中断有低电平触发和下降沿触发两种方式。通过定时器控制寄存器TCON中的IT0、IT1来选择和设定。 IT1为 中断触发方式控制位,当IT1 = 0,外部中断1控制为电平触发方式。当IT1 = 1,外部中断1控制为下降沿触发方式。 4 常用的中断函数定义语法如下: Obviously, face China's Socialist system, the Communist Party is not the party. In that case, political chaos has been very tight. Is remodeling or reconstruction, is a correction or a stove. Whether to turn right or left, is back to the source or put forward new political ideas. This is to determine the road problems in China, is also the key out of the deep water of the reform of the economic system. After 18, the new Central collective leadership attaches great importance to political orientation. First, the \cles\ng point, starting from the Central Government's self-restraint, which preaches and pro-image, brought fresh feeling to the community. Secondly, before reform and opening up and reform and opening two periods after non-negative, untying the tangle of the society a long time on this issue. Third, a new generation of party leaders on various occasions to Mao Ze-Dong and Mao Ze-Dong's thought of evaluation has room for manoeuvre, through to the ruling ideology of Mao Zedong thought, is the call of the soul to the Socialist Revolution and construction. Empty talks jeopardize national interests and try again, is an affirmation of Deng Xiao-ping's reform ideas. These strong political signal showing a new generation of political leaders is still keeping to the Socialist road. Four is revisiting the \o Ze-Dong's historical cycle of\ofile anti-corruption and the importance of the Constitution, reorganization is bad style of officialdom, was to civilize people obey the law, while improving the color change of the regime of vigilance. Five is to reform into deeper waters and stressed that top-level design, this is a review on the reform and opening up in the past, is also looking for a way out. Six foreign and Russia closer, the flexible attitude on the issue of the Korean peninsula, Sino-Japanese fishing hardline China on the island out of the \nt\ow profile shadow began to gradually plan development. Signs show that the new leadership began to make a left turn in politics. However, as of right now, not only ideological confusion in the community, the new leadership's thinking is messy. New leaders both stressed the need to implement the Constitution, stressed the need to turn off the power in a cage. Also stresses that Mao Zedong thought cannot be lost, 30 years after the reform and opening up 30 years ago can not deny each other. Both advocate democracy and release \n does not speak of\cal constraints. Neither deny the history of the CPC Central Committee on several issues ...Comrades: today brings together members, mainly in order to provide a platform to Exchange and learn from each other in order to facilitate our work. Just now, we focus on taxation, planning and stability, safety, project construction, typical topics such as private facts presentation and interaction, and towns currently exist in the in-depth analysis of the problems to be solved, to explore new methods to solve the problem. It can be said that summing up the achievement, no grandstanding; analysispromotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming majority of the people, maximize factors, enhance social development, improving social governance, the interests of national security, ensure that the people live and work, social stability and order. o improve social governance, stimulating social organization, innovative and effective system of preventing and resolving social conflicts, improving the public security system, set up the National Security Council, national security systems and national security strategy to ensure national security. Plenary session, the construction of ecological civilization, you must establish systems of ecological system, using the system to protect the ecological environment. o improve naturalresources asset property right system and use control, red line of delimitation of ecological protection, resources paid use system and ecological compensation system in ecological environment protection management system reform. Plenary session, centering on building a listening party command, can win and having a fine style of the people's army, a strong army under the new situation of the party Goals, restricting the development of national defense and army building is solved outstanding contradictions and problems, innovation and development of military theory, enhance military strategic guidance, improve the military strategy in the new period, building a modern military force system with Chinese characteristics. o deepen the adjustment of personnel system reform in the army, military policy and system reform, promote the development of military and civilian integration depth. Plenary session stressed that comprehensive reform must be to strengthen and improve theparty's leadership, give full play to the core role of the party commands the overall situation and coordinating all parties, improving the party's leading water ... Margin. Challenged the leadership of the Communist Party of China, Marxism-Leninism and Mao Zedong thought by Deng Xiao-ping's flag, replaced by three representatives and the harmonic society. The former Communist Party spirit and social cohesion point of almost all political makeover. Characteristics of socialism public ownership is shifting to private ownership, planned regulation and market regulation, the proletarian regime controlled by the elite. Of universal equality, fairness and basic principles of distribution system is socialist society, however after economic monopolized by powerful, vested interests growemployers do not have the same status, hardly seems fair social distribution. State key protection of capital interests rather than the interests of citizens, had been hits the bottom of the proletariat 答: void 函数名() interrupt n【using,m】

其中n为中断类型号,C51编译器允许0~31个中断,n取值范围0~31。

习题5答案

5,7段 LED静态和动态显示在硬件连接上分别具有什么特点

答:LED静态显示时各位数码管相对独立,公共端恒定接地(共阴极)或正电源(共阳极),每个数码管的8个字段分别与一个8位I/O口地址相连,适合于2个及其以下的数码管显示。动态显示时各位数码管的段选线相应并联在一起,由一个8位的I/O口控制,各位的段选线由另外的I/O口控制。

5.LED显示器一次能点亮多少行灯

答:每次只能点亮一行。其采用的为动态显示,具体原理为:从第一行开始点亮,每行点亮之间延时1ms,第八行结束后再从第一行开始循环显示。利用人体的视觉驻留现象,所以看到的是一个稳定的图形,好像8行同时点亮。

5.机械式按键组成的键盘,应如何消除按键抖动

答:可以采用硬件和软件两种方式,硬件上可在键输出端加RS触发器或单稳态触发器构成去抖电路,软件上可以在检测到有按键按下时,执行一个10ms左右的延时程序,然后确认该键是否仍保持闭合状态的电平。

5.独立式按键和矩阵式按键分别具有什么特点

答:独立式按键是直接用I/O口线构成的单个按键电路,其特点是每个按键单独占用一根I/O口线,适合于八键以下使用;矩阵式键盘由行线和列线组成,按键位于行、列线的交叉点上,在按键数量较多时,矩阵式键盘较之独立式按键键盘要节省很多I/O口,适合于八个键以上使用。

Obviously, face China's Socialist system, the Communist Party is not the party. In that case, political chaos has been very tight. Is remodeling or reconstruction, is a correction or a stove. Whether to turn right or left, is back to the source or put forward new political ideas. This is to determine the road problems in China, is also the key out of the deep water of the reform of the economic system. After 18, the new Central collective leadership attaches great importance to political orientation. First, the \cles\ng point, starting from the Central Government's self-restraint, which preaches and pro-image, brought fresh feeling to the community. Secondly, before reform and opening up and reform and opening two periods after non-negative, untying the tangle of the society a long time on this issue. Third, a new generation of party leaders on various occasions to Mao Ze-Dong and Mao Ze-Dong's thought of evaluation has room for manoeuvre, through to the ruling ideology of Mao Zedong thought, is the call of the soul to the Socialist Revolution and construction. Empty talks jeopardize national interests and try again, is an affirmation of Deng Xiao-ping's reform ideas. These strong political signal showing a new generation of political leaders is still keeping to the Socialist road. Four is revisiting the \o Ze-Dong's historical cycle of\ofile anti-corruption and the importance of the Constitution, reorganization is bad style of officialdom, was to civilize people obey the law, while improving the color change of the regime of vigilance. Five is to reform into deeper waters and stressed that top-level design, this is a review on the reform and opening up in the past, is also looking for a way out. Six foreign and Russia closer, the flexible attitude on the issue of the Korean peninsula, Sino-Japanese fishing hardline China on the island out of the \nt\ow profile shadow began to gradually plan development. Signs show that the new leadership began to make a left turn in politics. However, as of right now, not only ideological confusion in the community, the new leadership's thinking is messy. New leaders both stressed the need to implement the Constitution, stressed the need to turn off the power in a cage. Also stresses that Mao Zedong thought cannot be lost, 30 years after the reform and opening up 30 years ago can not deny each other. Both advocate democracy and release \n does not speak of\cal constraints. Neither deny the history of the CPC Central Committee on several issues ...Comrades: today brings together members, mainly in order to provide a platform to Exchange and learn from each other in order to facilitate our work. Just now, we focus on taxation, planning and stability, safety, project construction, typical topics such as private facts presentation and interaction, and towns currently exist in the in-depth analysis of the problems to be solved, to explore new methods to solve the problem. It can be said that summing up the achievement, no grandstanding; analysis

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promotion of employment, form a reasonable and orderly pattern of income distribution, build a more fair and sustainable social security systems, medical and health system reform. The plenary, innovation of social governance, must focus on the maintenance of fundamental interests of the overwhelming majority of the people, maximize factors, enhance social development, improving social governanc

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