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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题干的括号内。每小题2分,共20分) 1.把若干个模块连接起来成为可执行文件的系统程序是( ) A.汇编程序 B

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 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题干的括号内。每小题2分,共20)xF3★济宁成人高考报名电话0537-2229526

1.把若干个模块连接起来成为可执行文件的系统程序是(    )  A.汇编程序  B.连接程序    C.机器语言程序   D.源代码程序xF3★济宁成人高考报名电话0537-2229526

2.使汇编程序执行某种操作的命令是(    )  A.变量            B.指令            C.伪指令            D.宏指令xF3★济宁成人高考报名电话0537-2229526

3.串操作指令中,目的操作数的段地址一定在(    )寄存器中  A. CS             B. SS             C. DS               D. ESxF3★济宁成人高考报名电话0537-2229526

4.在下列语句中,AGAIN称为(    )  AGAIN:    INC  SI          A.符号     B.助记符    C.标号         D.变量xF3★济宁成人高考报名电话0537-2229526

5.MOV  BH1000SI],该指令中源操作数采用的寻址方式是(    )  A.立即    B.直接   C.寄存器相对  D.寄存器间接xF3★济宁成人高考报名电话0537-2229526

6.OR  ALAL(    )操作指令。  A.异或            B.加法            C.右移           D.逻辑或xF3★济宁成人高考报名电话0537-2229526

7.DOS系统功能调用中,显示单个字符的系统调用号是(    )H。  A. 01H            B. 02H            C. 08H           D. 09HxF3★济宁成人高考报名电话0537-2229526

8.使计算机执行某种操作的命令是(    )  A.宏指令          B.指令            C.伪指令         D.语句xF3★济宁成人高考报名电话0537-2229526

9.换码指令的助记符是(    )  A. XCHG           B. LEAS         C. ALXT         D. MOVxF3★济宁成人高考报名电话0537-2229526

10.计算机能直接识别并执行的语言是(    )  A.汇编语言         B.机器语言       C.高级语言       D.低级语言xF3★济宁成人高考报名电话0537-2229526

二、填空题(40)xF3★济宁成人高考报名电话0537-2229526

1.假设BL=0C5HCL=2,CF=1,确定下列各条指令独立执行后,BLCF中的值,并填入括号中。xF3★济宁成人高考报名电话0537-2229526

  A. SHR  BL1BL=(         )  CF=(         )      B. SAR  BLCLBL=(         )  CF=(         )xF3★济宁成人高考报名电话0537-2229526

  C. ROR  BL1BL=(         )  CF=(         )      D. RCL  BLCLBL=(         )  CF=(         )xF3★济宁成人高考报名电话0537-2229526

2.现有数据定义伪指令如下,写出对应的数据在存储单元中的存放形式。xF3★济宁成人高考报名电话0537-2229526

BUF1  DB  0152H         BUF2  DW  3  DUP(?0)    BUF3  DB  2  DUP(02DUP(12)3)xF3★济宁成人高考报名电话0537-2229526

 xF3★济宁成人高考报名电话0537-2229526

BUF1xF3★济宁成人高考报名电话0537-2229526

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BUF2xF3★济宁成人高考报名电话0537-2229526

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BUF3xF3★济宁成人高考报名电话0537-2229526

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 xF3★济宁成人高考报名电话0537-2229526

 xF3★济宁成人高考报名电话0537-2229526

3.计算机处理问题中会碰到大量的字符、符号,对此必须采用统一的二进制编码。目前,微机中普遍采用的是______码,称为美国____码。xF3★济宁成人高考报名电话0537-2229526

4.8086/8088CPU中,有二个变址寄存器,分别是____________,二个指针寄存器,分别是____________xF3★济宁成人高考报名电话0537-2229526

三、简答题(每小题15分,共15分)xF3★济宁成人高考报名电话0537-2229526

1.请指出下列指令错误原因:   xF3★济宁成人高考报名电话0537-2229526

 A. OR  AX,[CX]           xF3★济宁成人高考报名电话0537-2229526

B. ADD  SI],[BX][DI]          xF3★济宁成人高考报名电话0537-2229526

C. JMP  BYTE  PTR  LOOPS                              xF3★济宁成人高考报名电话0537-2229526

D. SAR  AX4              xF3★济宁成人高考报名电话0537-2229526

E. RCL  DXxF3★济宁成人高考报名电话0537-2229526

四、程序设计(25分)xF3★济宁成人高考报名电话0537-2229526

  试编制一程序段,用串操作指令实现以DA_BY为首址的20H个字节单元中存放相同字符‘Y’(设DA_BY存储区已有ES指向)。xF3★济宁成人高考报名电话0537-2229526

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