设 AX 中存放的是带符号数 , 对其进行除 8操作 , 能够完成此项功能的指令序列()
A SHR AX,2
B SAR AX,2 SHR AX,2 SAR AX,1
C MOV CL,3
D MOV CL,3 SHR AX,CL SAR AX,CL
请执行下段程序,给出各寄存器的内容。
MOV AX,0A0BH ADD AL,25H
DEC AX XCHG AL,AH
SUB AX,0FFH PUSH AX
AND AX,00FFH POP BX
MOV CL,3 INC BL
SAL AL,CL MUL BL
A.220V±5%V50Hz±2Hz
B.220V±5%V50Hz±5Hz
C.220V±10%V50Hz±5Hz
D.220V±10%V50Hz±2Hz
(Passage 3, Lines 4-5, Para. 2)
... we find that we have to deal with things like climate, soil, plants, and such-like factors common to all biological situations;
请指出下列各组中半径最小的原子或离子: (1)Li,Na,K; (2)P,As,Bi; (3)O+,O,O-; (4)S,Cl,Ar; (5)Pd,Ni,Cu
Paragraphs 2 and 3 explain ______.
A.those good things are not without side effects
B.why clever advertising is so powerful
C.why in modern times self-medication is still practised
D.why people develop faulty ways of life
A.6
B.12
C.15
D.#REF