Let's go and have __________ his new CD.[ ]
A. look at
B. a look at
C. a look
答案:B
若X和Y均为无符号整数,且X≤Y,则依次执行MOV AX,X和CMP AX,Y指令后,标志位CF和ZF的状态是:
A.CF=0且ZF=0
B.CF=1且ZF=1
C.CF=0或ZF=0
D.CF=1或ZF=1
电子式电压调节器是利用()控制激磁电路的通断来调节输出电压。
A.稳压管
B三极管
C.二极管
D.电容