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up, and members cadres shoe vocational due diligence combined up, ensure successfully completed early determine of the target task, ensure successfully completed levels leadership general task, ensure successfully completed poverty storming annual target task, ensure social overall harmony stable. Three, compacting the main responsibilities and strengthen the "two" leadership of educational organizations do a good job "two" education without a strong organization and leadership. Party construction of party organizations at all levels should firmly establish the main consciousness, grasping party building as the first responsibility, strengthen leadership, demonstrable, scientific to ensure solid education effectively. First, the layers of responsibility. Party committees (leading party group) to study education as a major political task, primary responsibility for effective implementation, strengthen leadership, carefully guiding the Steering, do a good job overall, study and solve problems in a timely manner. Progress evaluation by the grass-roots party building this year, to study education as the primary evaluation organizations, poor organization, the problems are many, to criticize, to accountability. Main is responsible for
comrade to consciously bear up first responsibility people duties, not only to tube good cadres, and with good team, also to tube good members, and with good team, both first examples, lead participate in learning education, and by Qian command, input enough of time and energy, strengthened Guide and checks role, on work programme personally validation, on important task personally deployment, on exists problem timely solution, throughout put responsibility carry in shoulder Shang, improper "shuaishouzhanggui". The County party Committee and municipal party Committee municipal workers, Various enterprises and institutions, Commission, party committees and departments in charge of industry practice, develop specific implementation plan, organizing special forces responsible for educational work to strengthen this unit to the system study and education in the region specific guidance. Organization departments, as the lead department, to strengthen the planning, organization, coordination and guidance, good design, decomposition, each key action to implement. Carry out study and education, to rely on strict doc real guide, pressure conveying layer upon layer, step by step, compaction of responsibility. In
steering the Steering must prevent formalism, catch the way the thinking of prevention activities, study and education, preventing routine aside, prevent simple, doing as much as meeting notes to judge the educational results. To take reports, customized research, attending the meeting, random spot checks, briefings and other means, to focus the push Guide to grassroots, on the party branch, in-depth understanding of education and actual effect, sum up fresh experience to promote grass roots, to detect and correct the signs of problems. Public information
在现代社会里要维持一个家庭并不容易,尤其是能使一个家庭过上好日子更不容易。因为过日子不可避免地要涉及必要的经济负担
departments should pay special attention to public opinion, in-depth information relating to provincial, municipal and Central decisions and arrangements to promote educational effectiveness and progress of the typical experience, and create a good social atmosphere. Second, persevering in above rates. Leading bodies at all levels, leadership, leading cadres should take the lead, as a good example, and asking others to do you first do it, asks of others and not themselves determined not to do, for example of superior to subordinate, team leader for team members for example, level to level, level with levels, layers of driven model, layer upon layer, formation of the shots, the overall general effect of linkage. Need stressed of is, regardless of what ranks, and what post of members leaders, are to to General members identity put himself pendulum in, seriously implementation Central and provincial, and municipal on learning education of the requirements, strictly implementation double organised, basic system, lead learning discussion, lead on experience, and told party lecture, and for report, lead participate in organised will, and democratic comments, lead shoe vocational due diligence, and based post for contribution, do
"four told four has" of qualified Communist, strive to makes learning research more in-depth, and check pendulum problem more deep , To reorganize the implementation of more radical, avant-garde more respectable image, thus learning education effective. Third, strengthen the guidance. The education for all members, large personnel base, wide field, hierarchy, difference, and to differentiate between counties, departments, grass-roots units, all kinds of party organization and party member between the actual characteristics of hierarchical classification positions put forward measures to prevent "flood irrigation." To have operable. Each party should develop specific programmes and specific measures, education principles and learning requirements into operational, able to put in place ways. To grasp from the specific work, hard, catching fine practice, with concrete results to verify the educational results. Should be targeted. Different party member's ideological trends and behaviors, differential treatment in education, precision application policy, "key starts locks", down to learn and do the measures each party member, enabling them to access to education, improve, make people feel Members of the new changes.
To reflect the difference. No uniform, thousands of people, and give expression differences, characteristics. In determining the learning when the topic was discussed, according to different characteristics and existing problems of party members, both closely linked to the theme, and reality, let party members learn, on the up. Do qualified Communist of standard also cannot uniform, County above members leaders standard to more high more strict, to insisted loyalty clean play, do Jiao Yulu type of good cadres; on County following the field the industry of members to
《单片机与接口技术》习题库及答案
一、判断题(判断每小题的对错,对的在小题前的括号中打“√”,错的在小题前的括号中打
“×”。)
MCS-51 单片机原理与结构
(×)1.MCS-51 单片机是高档 16 位单片机。
(√)2.MCS-51 的产品 8051 与 8031 的区别是:8031 片内无 ROM。
(×)3.单片机的 CPU 从功能上可分为运算器和存储器。
(√)4.8051 的累加器 ACC 是一个 8 位的寄存器,简称为 A,用来存一个操作数或中间结果。
(√)5.8051 的程序状态字寄存器 PSW 是一个 8 位的专用寄存器,用于存放程序运行中的各种状态信息。
(×)6.MCS-51 的程序存储器用于存放运算中间结果。
(√)7.MCS-51 的数据存储器在物理上和逻辑上都分为两个地址空间:一个是片内的 256 字节的 RAM,另一
个是片外最大可扩充 64K 字节的 RAM。
(√)8.单片机的复位有上电自动复位和按钮手动复位两种,当单片机运行出错或进入死循环时,可按复位键重
新启动。
(√)9.CPU 的时钟周期为振荡器频率的倒数。
(×)10.单片机的一个机器周期是指完成某一个规定操作所需的时间,一般情况下,一个机器周期等于一个时
钟周期。
(√)11.单片机的指令周期是执行一条指令所需要的时间。一般由若干个机器周期组成。
(×)12.单片机系统扩展时使用的锁存器,是用于锁存高 8 位地址。
(×)13.MCS-51 单片机上电复位后,片内数据存储器的内容均为 00H。
(√)14.当 8051 单片机的晶振频率为 12MHZ 时,ALE 地址锁存信号端的输出频率为 2MHZ 的脉冲。
(√)15.8051 单片机片内 RAM 从 00H~1FH 的 32 个单元,不仅可以作工作寄存器使用,而且可作为通用 RAM 来
读写。
(×)16.MCS-51 单片机的片内存储器称为程序存储器。
(×)17.MCS-51 单片机的数据存储器是指外部存储器。
(√)18.MCS-51 单片机的特殊功能寄存器集中布置在片内数据存储器的一个区域中。
MCS-51 单片机指令系统及程序设计
(×)19.MCS-51 单片机的指令格式中操作码与操作数之间必须用“,”分隔。
(√)20.MCS-51 指令:MOV A,#40H ;表示将立即数 40H 传送至 A 中。
(√)21.MCS-51 指令:MOV A,@R0 ;表示将 R0 指示的地址单元中的内容传送至 A 中。
(√)22.MCS-51 指令:MOVX A,@DPTR ;表示将 DPTR 指示的地址单元中的内容传送至 A 中。
(×)23.MCS-51 的数据传送指令是把源操作数传送到目的操作数,指令执行后,源操作数改变,目的操作数修
改为源操作数。
(√)24.MCS-51 指令中,MOVX 为片外 RAM 传送指令。
(×)25.MCS-51 指令中,MOVC 为 ROM 传送指令。
(×)26.将 37H 单元的内容传送至 A 的指令是:MOV A,#37H。
(√)27.MCS-51 指令中,16 位立即数传送指令是:MOV DPTR,#data16。
(√)28.MCS-51 单片机,CPU 对片外 RAM 的访问只能用寄存器间接寻址的方式,且仅有 4 条指令。
(×)29.如 JC rel 发生跳转时,目标地址为当前指令地址加上偏移量。
(√)30.对于 8051 单片机,当 CPU 对内部程序存储器寻址超过 4K 时,系统会自动在外部程序存储器中寻址。
(×)31.指令 MUL AB 执行前(A)=F0H,(B)=05H,执行后(A)=FH5,(B)=00H。
(√)32.已知:DPTR=11FFH 执行 INC DPTR 后,结果:DPTR=1200H。
(√)33.已知:A=11H B=04H,执行指令 DIV AB 后,其结果:A=04H,B=1 CY=OV=0。
(×)34.已知:A=1FH,(30H)=83H,执行 ANL A,30H 后,结果:A=03H (30H)=83H P=0。
(×)35.无条件转移指令 LJMP addr16 称长转移指令,允许转移的目标地址在 128KB 空间范围内。
(×)36.在进行二——十进制运算时,必须用到 DA A 指令。
up, and members cadres shoe vocational due diligence combined up, ensure successfully completed early determine of the target task, ensure successfully completed levels leadership general task, ensure successfully completed poverty storming annual target task, ensure social overall harmony stable. Three, compacting the main responsibilities and strengthen the "two" leadership of educational organizations do a good job "two" education without a strong organization and leadership. Party construction of party organizations at all levels should firmly establish the main consciousness, grasping party building as the first responsibility, strengthen leadership, demonstrable, scientific to ensure solid education effectively. First, the layers of responsibility. Party committees (leading party group) to study education as a major political task, primary responsibility for effective implementation, strengthen leadership, carefully guiding the Steering, do a good job overall, study and solve problems in a timely manner. Progress evaluation by the grass-roots party building this year, to study education as the primary evaluation organizations, poor organization, the problems are many, to criticize, to accountability. Main is responsible for
comrade to consciously bear up first responsibility people duties, not only to tube good cadres, and with good team, also to tube good members, and with good team, both first examples, lead participate in learning education, and by Qian command, input enough of time and energy, strengthened Guide and checks role, on work programme personally validation, on important task personally deployment, on exists problem timely solution, throughout put responsibility carry in shoulder Shang, improper "shuaishouzhanggui". The County party Committee and municipal party Committee municipal workers, Various enterprises and institutions, Commission, party committees and departments in charge of industry practice, develop specific implementation plan, organizing special forces responsible for educational work to strengthen this unit to the system study and education in the region specific guidance. Organization departments, as the lead department, to strengthen the planning, organization, coordination and guidance, good design, decomposition, each key action to implement. Carry out study and education, to rely on strict doc real guide, pressure conveying layer upon layer, step by step, compaction of responsibility. In
steering the Steering must prevent formalism, catch the way the thinking of prevention activities, study and education, preventing routine aside, prevent simple, doing as much as meeting notes to judge the educational results. To take reports, customized research, attending the meeting, random spot checks, briefings and other means, to focus the push Guide to grassroots, on the party branch, in-depth understanding of education and actual effect, sum up fresh experience to promote grass roots, to detect and correct the signs of problems. Public information
在现代社会里要维持一个家庭并不容易,尤其是能使一个家庭过上好日子更不容易。因为过日子不可避免地要涉及必要的经济负担
departments should pay special attention to public opinion, in-depth information relating to provincial, municipal and Central decisions and arrangements to promote educational effectiveness and progress of the typical experience, and create a good social atmosphere. Second, persevering in above rates. Leading bodies at all levels, leadership, leading cadres should take the lead, as a good example, and asking others to do you first do it, asks of others and not themselves determined not to do, for example of superior to subordinate, team leader for team members for example, level to level, level with levels, layers of driven model, layer upon layer, formation of the shots, the overall general effect of linkage. Need stressed of is, regardless of what ranks, and what post of members leaders, are to to General members identity put himself pendulum in, seriously implementation Central and provincial, and municipal on learning education of the requirements, strictly implementation double organised, basic system, lead learning discussion, lead on experience, and told party lecture, and for report, lead participate in organised will, and democratic comments, lead shoe vocational due diligence, and based post for contribution, do
"four told four has" of qualified Communist, strive to makes learning research more in-depth, and check pendulum problem more deep , To reorganize the implementation of more radical, avant-garde more respectable image, thus learning education effective. Third, strengthen the guidance. The education for all members, large personnel base, wide field, hierarchy, difference, and to differentiate between counties, departments, grass-roots units, all kinds of party organization and party member between the actual characteristics of hierarchical classification positions put forward measures to prevent "flood irrigation." To have operable. Each party should develop specific programmes and specific measures, education principles and learning requirements into operational, able to put in place ways. To grasp from the specific work, hard, catching fine practice, with concrete results to verify the educational results. Should be targeted. Different party member's ideological trends and behaviors, differential treatment in education, precision application policy, "key starts locks", down to learn and do the measures each party member, enabling them to access to education, improve, make people feel Members of the new changes.
To reflect the difference. No uniform, thousands of people, and give expression differences, characteristics. In determining the learning when the topic was discussed, according to different characteristics and existing problems of party members, both closely linked to the theme, and reality, let party members learn, on the up. Do qualified Communist of standard also cannot uniform, County above members leaders standard to more high more strict, to insisted loyalty clean play, do Jiao Yulu type of good cadres; on County following the field the industry of members to2
(×)37.MCS-51 指令系统中,执行指令 ORG 2000H;
BCD: DB “A,B,C,D”;
表示将 A、B、C、D 的 ASII 码值依次存入 2000H 开始的连续单元中。
(×)38.MCS-51 指令系统中,指令 CJNE A,#data, rel 的作用相当于 SUBB A,#data 与 JNC rel 的作用。
(×)39.MCS-51 指令系统中,指令 JNB bit,rel 是判位转移指令,即表示 bit=1 时跳转。
(×)40.8051 单片机的 PC 与 DPTR 都在 CPU 片内,因此指令 MOVC A,@A+PC 与指令 MOVC A,@A+DPTR 执行时只
在单片机内部操作,不涉及片外存储器。
(×)41.MCS-51 单片机中 PUSH 和 POP 指令只能保护现场,不能保护断点。
(√)42.指令 LCALL addr16 能在 64K 字节范围内调用子程序。
(×)43.设 PC 的内容为 35H,若要把程序存贮器 08FEH 单元的数据传送至累加器 A,则必须使用指令 MOVC A,
@A+PC。
(×)44.指令 MOV A,00H 执行后 A 的内容一定为 00H。
定时、中断、串行口系统及应用
(×)45.在 MCS-51 单片机内部结构中,TMOD 为模式控制寄存器,主要用来控制定时器的启动与停止。
(√)46.在 MCS-51 单片机内部结构中,TCON 为控制寄存器,主要用来控制定时器的启动与停止。
(√)47.MCS-1 单片机的两个定时器均有两种工作方式,即定时和计数工作方式。
(√)48.MCS-51 单片机的 TMOD 模式控制寄存器不能进行位寻址,只能用字节传送指令设置定时器的工作方式
及操作模式。
(√)49.MCS-51 单片机系统复位时,TMOD 模式控制寄存器的低 4 位均为 0。
(×)50.8051 单片机 5 个中断源相应地在芯片上都有中断请求输入引脚。
(√)51.启动定时器工作,可使用 SETB TRi 启动。
(×)52.8051 单片机对最高优先权的中断响应是无条件的。
(×)53.中断初始化时,对中断控制器的状态设置,只可使用位操作指令,而不能使用字节操作指令。
(√)54.MCS-51 单片机系统复位后,中断请求标志 TCON 和 SCON 中各位均为 0。
(√)55.MCS-51 单片机的中断允许寄存器的 IE 的作用是用来对各中断源进行开放或屏蔽的控制。
(√)56.用户在编写中断服务程序时, 可在中断入口矢量地址存放一条无条件转移指令,以防止中断服务程序
容纳不下。
(√)57.若要在执行当前中断程序时禁止更高优先级中断,应用软件关闭 CPU 中断,或屏蔽更高级中断源的中
断,在中断返回时再开放中断。
(√)58.串行口的中断,CPU 响应中断后,必须在中断服务程序中,用软件清除相应的中断标志位,以撤消中
断请求。
(√)59.串行口数据缓冲器 SBUF 是可以直接寻址的专用寄存器。
(√)60.如要允许外部中断 0 中断,应置中断允许寄存器 IE 的 EA 位和 EX0 位为 1。
(√)61.指令 JNB TF0,LP 的含义是:若定时器 T0 未计满数,就转 LP。
(√)62.若置 8051 的定时器/计数器 T1 于定时模式,工作于方式 2,则工作方式字为 20H。
(√)63.若置 8051 的定时器/计数器 T1 于计数模式,工作于方式 1,则工作方式字为 50H。
(×)64.当 8051 的定时器 T0 计满数变为 0 后,溢出标志位(TCON 的 TF0)也变为 0。
(√)65.外部中断 0 中断的入口地址是 0003H。
(√)66. 8051 单片机允许 5 个中断源请求中断,都可以用软件来屏蔽,即利用中断允许寄存器 IE 来控制中断
的允许和禁止。
单片微机基本系统扩展
(√)67.线选法是把单根的低位地址线直接接到存储器芯片的片选端。
(√)68.对于 8051 单片机而言,在外部扩展 EPROM 时,
EA
引脚应接地。
(×)69.对于 8051 单片机而言,在外部扩展 EPROM 时,
EA
引脚可接 + 5V 或接地。
up, and members cadres shoe vocational due diligence combined up, ensure successfully completed early determine of the target task, ensure successfully completed levels leadership general task, ensure successfully completed poverty storming annual target task, ensure social overall harmony stable. Three, compacting the main responsibilities and strengthen the "two" leadership of educational organizations do a good job "two" education without a strong organization and leadership. Party construction of party organizations at all levels should firmly establish the main consciousness, grasping party building as the first responsibility, strengthen leadership, demonstrable, scientific to ensure solid education effectively. First, the layers of responsibility. Party committees (leading party group) to study education as a major political task, primary responsibility for effective implementation, strengthen leadership, carefully guiding the Steering, do a good job overall, study and solve problems in a timely manner. Progress evaluation by the grass-roots party building this year, to study education as the primary evaluation organizations, poor organization, the problems are many, to criticize, to accountability. Main is responsible for
comrade to consciously bear up first responsibility people duties, not only to tube good cadres, and with good team, also to tube good members, and with good team, both first examples, lead participate in learning education, and by Qian command, input enough of time and energy, strengthened Guide and checks role, on work programme personally validation, on important task personally deployment, on exists problem timely solution, throughout put responsibility carry in shoulder Shang, improper "shuaishouzhanggui". The County party Committee and municipal party Committee municipal workers, Various enterprises and institutions, Commission, party committees and departments in charge of industry practice, develop specific implementation plan, organizing special forces responsible for educational work to strengthen this unit to the system study and education in the region specific guidance. Organization departments, as the lead department, to strengthen the planning, organization, coordination and guidance, good design, decomposition, each key action to implement. Carry out study and education, to rely on strict doc real guide, pressure conveying layer upon layer, step by step, compaction of responsibility. In
steering the Steering must prevent formalism, catch the way the thinking of prevention activities, study and education, preventing routine aside, prevent simple, doing as much as meeting notes to judge the educational results. To take reports, customized research, attending the meeting, random spot checks, briefings and other means, to focus the push Guide to grassroots, on the party branch, in-depth understanding of education and actual effect, sum up fresh experience to promote grass roots, to detect and correct the signs of problems. Public information
在现代社会里要维持一个家庭并不容易,尤其是能使一个家庭过上好日子更不容易。因为过日子不可避免地要涉及必要的经济负担
departments should pay special attention to public opinion, in-depth information relating to provincial, municipal and Central decisions and arrangements to promote educational effectiveness and progress of the typical experience, and create a good social atmosphere. Second, persevering in above rates. Leading bodies at all levels, leadership, leading cadres should take the lead, as a good example, and asking others to do you first do it, asks of others and not themselves determined not to do, for example of superior to subordinate, team leader for team members for example, level to level, level with levels, layers of driven model, layer upon layer, formation of the shots, the overall general effect of linkage. Need stressed of is, regardless of what ranks, and what post of members leaders, are to to General members identity put himself pendulum in, seriously implementation Central and provincial, and municipal on learning education of the requirements, strictly implementation double organised, basic system, lead learning discussion, lead on experience, and told party lecture, and for report, lead participate in organised will, and democratic comments, lead shoe vocational due diligence, and based post for contribution, do
"four told four has" of qualified Communist, strive to makes learning research more in-depth, and check pendulum problem more deep , To reorganize the implementation of more radical, avant-garde more respectable image, thus learning education effective. Third, strengthen the guidance. The education for all members, large personnel base, wide field, hierarchy, difference, and to differentiate between counties, departments, grass-roots units, all kinds of party organization and party member between the actual characteristics of hierarchical classification positions put forward measures to prevent "flood irrigation." To have operable. Each party should develop specific programmes and specific measures, education principles and learning requirements into operational, able to put in place ways. To grasp from the specific work, hard, catching fine practice, with concrete results to verify the educational results. Should be targeted. Different party member's ideological trends and behaviors, differential treatment in education, precision application policy, "key starts locks", down to learn and do the measures each party member, enabling them to access to education, improve, make people feel Members of the new changes.
To reflect the difference. No uniform, thousands of people, and give expression differences, characteristics. In determining the learning when the topic was discussed, according to different characteristics and existing problems of party members, both closely linked to the theme, and reality, let party members learn, on the up. Do qualified Communist of standard also cannot uniform, County above members leaders standard to more high more strict, to insisted loyalty clean play, do Jiao Yulu type of good cadres; on County following the field the industry of members to3
(√)70.在接口芯片中,通常都有一个片选端 CS(或
CE
),作用是当 CS 为低电平时该芯片才能进行读写操作。
(×)71.DAC0832 是 8 位 D/A 转换器,其输出量为数字电流量。
机电接口技术
(√)72.DAC 0832 的片选信号输入线
CS
,低电平有效。
(√)73.AGND 代表模拟信号和基准电源的参考地,称模拟地。
(√)74.DGND 表示数字地,为工作电源地和数字逻辑地。
二、单项选择题(在每小题的四个备选答案中,选出一个正确答案,并将正确答案的序号填在空格
内。)
MCS-51 单片机原理与结构
1.MCS-51 单片机 CPU 的主要组成部分为 A 。
A.运算器、控制器 B.加法器、寄存器 C.运算器、加法器 D.运算器、译码器
2.单片机能直接运行的程序叫 C 。
A. 源程序 B.汇编程序 C.目标程序 D.编译程序
3.单片机中的程序计数器 PC 用来 C 。
A.存放指令 B.存放正在执行的指令地址 C.存放下一条指令地址
D.存放上一条指令地址
4.单片机上电复位后,PC 的内容和 SP 的内容为 B 。
A.0000H,00H B.0000H,07H C.0003H,07H D.0800H,08H
5.单片机 8051 的 ALE 引脚是 B 。
A.输出高电平 B.输出矩形脉冲,频率为 fosc 的 1/6
C.输出低电平 D.输出矩形脉冲,频率为 fosc 的 1/2
6.单片机 8051 的
EA
引脚 C 。
A.必须接地 B.必须接+5V C.以上两种视需要而定
7.访问外部存储器或其它接口芯片时,作数据线和低 8 位地址线的是 A 。
A.P0 口 B.P1 口 C.P2 口 D.P0 口 和 P2 口
8.PSW 中的 RS1 和 RS0 用来 A 。
A. 选择工作寄存器组号 B.指示复位 C.选择定时器 D.选择工作方式
9.上电复位后,PSW 的值为 D 。
A.1 B.07H C.0FFH D.0
10.8051 单片机上电复位后,堆栈区的最大允许范围是 B 个单元。
A.64 B.120 C.128 D.256
11.8051 单片机上电复位后,堆栈区的最大允许范围是内部 RAM 的 D 。
A.00H—FFH B.00H—07H C.07H—7FH D.08H—7FH
12.复位后,堆栈指针 SP 在内部 RAM 中的直接地址是 C 。
A.00H B.07H C.81H D.FFH
13. 8051 的 P0 口,当使用外部存储器时它是一个 D 。
A.传输高 8 位地址口 A.传输低 8 位地址口
C.传输高 8 位数据口 D.传输低 8 位地址/数据口
14.P0 口作数据线和低 8 位地址线时 B 。
A.应外接上拉电阻 B.不能作 I/O 口 C.能作 I/O 口 D.应外接高电平
15.对于 8051 单片机,其内部 RAM20H-2FH 单元 C 。
A.只能位寻址 B.只能字节寻址 C.既可位寻址又可字节寻址
D.少部分只能位寻址
16.寻址方式就是 C 的方式。
up, and members cadres shoe vocational due diligence combined up, ensure successfully completed early determine of the target task, ensure successfully completed levels leadership general task, ensure successfully completed poverty storming annual target task, ensure social overall harmony stable. Three, compacting the main responsibilities and strengthen the "two" leadership of educational organizations do a good job "two" education without a strong organization and leadership. Party construction of party organizations at all levels should firmly establish the main consciousness, grasping party building as the first responsibility, strengthen leadership, demonstrable, scientific to ensure solid education effectively. First, the layers of responsibility. Party committees (leading party group) to study education as a major political task, primary responsibility for effective implementation, strengthen leadership, carefully guiding the Steering, do a good job overall, study and solve problems in a timely manner. Progress evaluation by the grass-roots party building this year, to study education as the primary evaluation organizations, poor organization, the problems are many, to criticize, to accountability. Main is responsible for
comrade to consciously bear up first responsibility people duties, not only to tube good cadres, and with good team, also to tube good members, and with good team, both first examples, lead participate in learning education, and by Qian command, input enough of time and energy, strengthened Guide and checks role, on work programme personally validation, on important task personally deployment, on exists problem timely solution, throughout put responsibility carry in shoulder Shang, improper "shuaishouzhanggui". The County party Committee and municipal party Committee municipal workers, Various enterprises and institutions, Commission, party committees and departments in charge of industry practice, develop specific implementation plan, organizing special forces responsible for educational work to strengthen this unit to the system study and education in the region specific guidance. Organization departments, as the lead department, to strengthen the planning, organization, coordination and guidance, good design, decomposition, each key action to implement. Carry out study and education, to rely on strict doc real guide, pressure conveying layer upon layer, step by step, compaction of responsibility. In
steering the Steering must prevent formalism, catch the way the thinking of prevention activities, study and education, preventing routine aside, prevent simple, doing as much as meeting notes to judge the educational results. To take reports, customized research, attending the meeting, random spot checks, briefings and other means, to focus the push Guide to grassroots, on the party branch, in-depth understanding of education and actual effect, sum up fresh experience to promote grass roots, to detect and correct the signs of problems. Public information
在现代社会里要维持一个家庭并不容易,尤其是能使一个家庭过上好日子更不容易。因为过日子不可避免地要涉及必要的经济负担
departments should pay special attention to public opinion, in-depth information relating to provincial, municipal and Central decisions and arrangements to promote educational effectiveness and progress of the typical experience, and create a good social atmosphere. Second, persevering in above rates. Leading bodies at all levels, leadership, leading cadres should take the lead, as a good example, and asking others to do you first do it, asks of others and not themselves determined not to do, for example of superior to subordinate, team leader for team members for example, level to level, level with levels, layers of driven model, layer upon layer, formation of the shots, the overall general effect of linkage. Need stressed of is, regardless of what ranks, and what post of members leaders, are to to General members identity put himself pendulum in, seriously implementation Central and provincial, and municipal on learning education of the requirements, strictly implementation double organised, basic system, lead learning discussion, lead on experience, and told party lecture, and for report, lead participate in organised will, and democratic comments, lead shoe vocational due diligence, and based post for contribution, do
"four told four has" of qualified Communist, strive to makes learning research more in-depth, and check pendulum problem more deep , To reorganize the implementation of more radical, avant-garde more respectable image, thus learning education effective. Third, strengthen the guidance. The education for all members, large personnel base, wide field, hierarchy, difference, and to differentiate between counties, departments, grass-roots units, all kinds of party organization and party member between the actual characteristics of hierarchical classification positions put forward measures to prevent "flood irrigation." To have operable. Each party should develop specific programmes and specific measures, education principles and learning requirements into operational, able to put in place ways. To grasp from the specific work, hard, catching fine practice, with concrete results to verify the educational results. Should be targeted. Different party member's ideological trends and behaviors, differential treatment in education, precision application policy, "key starts locks", down to learn and do the measures each party member, enabling them to access to education, improve, make people feel Members of the new changes.
To reflect the difference. No uniform, thousands of people, and give expression differences, characteristics. In determining the learning when the topic was discussed, according to different characteristics and existing problems of party members, both closely linked to the theme, and reality, let party members learn, on the up. Do qualified Communist of standard also cannot uniform, County above members leaders standard to more high more strict, to insisted loyalty clean play, do Jiao Yulu type of good cadres; on County following the field the industry of members to4
A.查找指令操作码 B.查找指令 C.查找指令操作数 D.查找指令操作码和操作数
17.8051 单片机若晶振频率为 fosc=12MHz,则一个机器周期等于 C µS。
A.1/12 B.1/2 C.1 D.2
18.MCS-51 单片机的数据指针 DPTR 是一个 16 位的专用地址指针寄存器,主要用来 B 。
A.存放指令 B.存放 16 位地址,作间址寄存器使用 C.存放下一条指令地址
D.存放上一条指令地址
19.ALU 表示 D 。D
A.累加器 B.程序状态字寄存器 C.计数器 D.算术逻辑部件
20.单片机上电后或复位后,工作寄存器 R0 是在 A 。
A.0 区 00H 单元 B.0 区 01H 单元 C.0 区 09H 单元 D.SFR
21.单片机 8051 的 XTAL1 和 XTAL2 引脚是 D 引脚。
A.外接定时器 B.外接串行口 C.外接中断 D.外接晶振
22.8051 单片机的 V
SS
(20)引脚是 B 引脚。
A.主电源+5V B.接地 C.备用电源 D.访问片外存贮器
23.8051 单片机的 VCC(40)引脚是 A 引脚。
A.主电源+5V B.接地 C.备用电源 D.访问片外存贮器
24.8051 单片机中,输入/输出引脚中有专门的第二功能的引脚是 D 。
A.P0 B.P1 C.P2 D.P3
25.MCS-51 复位后,程序计数器 PC= B 。即单片机从 B 开始执行指令。
A.0001H B.0000H C.0003H D.0023H
26.MCS-51 的片内外的 ROM 是统一编址的,如果
EA
端保持高电平,8051 的程序计数器 PC 在 B 地址范
围内。
A.1000H—FFFFH B.0000H—FFFFH C.0001H—0FFFH D.0000H—0FFFH
27.单片机的堆栈指针 SP 始终是指示 B 。
A.堆栈底 B.堆栈顶 C.堆栈地址 D.堆栈中间位置
28.单片机的 P0、P1 口作输入用途之前必须 A 。
A.在相应端口先置 1 B.在相应端口先置 0 C.外接高电平 D.外接上拉电阻
29.MCS-51 的串行数据缓冲器 SBUF 用于 B 。
A.存放运算中间结果 B.存放待发送或已接收到的数据 C.暂存数据和地址
D.存放待调试的程序
30.MCS-51 单片机的 P1 口的功能是 A 。
A.可作通用双向 I/O 口用
C.可作地址/数据总线用
31.MCS-51 单片机复位后,专用寄存器 ACC 的状态是 C 。
A.01H B.07H C.00H D.0FFH
32.当程序状态字寄存器 PSW 状态字中 RS1 和 RS0 分别为 0 和 1 时,系统使用的工作寄存器组为 B 。
A.组 0 B.组 1 C.组 2 D.组 3
33.8051 单片机中,用户可使用的 16 位寄存器是 D 。
A.PSW B.ACC C. SP D.DPTR
34.8051 的程序计数器 PC 为 16 位计数器,其寻址范围是 D 。
A.8K B.16K C.32K D.64K
35.单片机应用程序一般存放在 B 中。
A.RAM B.ROM C.寄存器 D.CPU
MCS-51 单片机指令系统及程序设计
36.MCS-51 汇编语言指令格式中,唯一不可缺少的部分是 B 。
A.标号 B.操作码 C.操作数 D.注释
37.MCS-51 的立即寻址方式中,立即数前面 D 。
A.应加前缀“/:”号 B.不加前缀号 C.应加前缀“@”号 D.应加前缀“#”号
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