执行完下列指令后： MOV AX，1234H MOV CL，4 ROL AX， CL DEC AX MOV CX，4
A. 60H
B. 00H
C. 04H
D. A0H
对于下列程序段；
AGAIN： MOV ES：[DI]，AL
INC DI
LOOP AGAIN
可用指令()完成相同的功能。
A. REP MOVSB
B. REP LODSB
C. REP STOSB
D. REP SCASB
Modern societies control supply and demand
A. by intervention in pricing goods and services.
B. by means of money and the price mechanism.
C. by keeping a watchful eye on price changes.
D. by fixing proper prices for specific industries.
From paragraph one, we know that economics is
A. same with other social sciences in all the rubbish about it.
B. opposite to other social sciences in the way of research.
C. similar to all other sciences in trying to foretell man's. activities.
D. different from most sciences in its attempt to avoid misguidance.
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