A对
B错
设有关系模式R(C,T,S,N,G),其上的函数依赖集:F={C→T,CS→G,S→N}求出R的所有候选关键字。
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START
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阅读下面的程序,回答问题 DATA SEGMENT BUF DB '1234' N=$-BUF BCD DB N DUP(?) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START:MOV AX,DATA MOV DS,AX LEA SI,BUF MOV CX,N LEA DI,BCD+N-1 LOOP1:MOV AL,[SI] SUB AL,30H MOV [DI],AL INC SI DEC DI DEC CX JNE LOOP1 MOV AH,4CH INT 21H CODE ENDS END START 如果将代码段中的指令LEA DI,BCD+N-1改成LEA DI,BCD;DEC DI改成INC DI,其它指令不变,程序执行后,从BCD开始的N个字节单元中的内容是什么?
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与Photoshop CS2相比,ImageReady CS2独有有功能是()。
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