dx=（）。

A、MOV AL,04H MOV DX,0348H OUT DX,AL MOV DX,0349H AA: IN AL,DX TEST AL,08H JZ AA MOV DX,0348H IN AL,DX HLT

B、MOV DX,0348H OUT DX,AL MOV DX,0349H AA: IN AL,DX TEST AL,08H JZ AA MOV DX,0348H IN AL,DX HLT

C、MOV AL,04H MOV DX,0348H OUT DX,AL MOV DX,0349H AA: IN AL,DX TEST AL,10H JZ AA MOV DX,0348H IN AL,DX HLT

D、MOV AL,04H MOV DX,0348H OUT DX,AL MOV DX,0349H AA: IN AL,DX TEST AL,08H JNZ AA MOV DX,0348H IN AL,DX HLT

若 (AX=1234H,(DX=89ABH,执行 XCHG AX,DX指令后 ,AX 、 DX 中的内容应()

A (AX=1234H (DX=1234H

B (AX=12ABH (DX=8934H

C (AX=89ABH (DX=1234H

D (AX=89ABH (DX=89ABH

A.(2xcos2x-2x2sin2x)dx

B.(2xcos2x+2x2sin2x)dx

C.(2xcos2x+x2sin2x)dx

D.(2xcos2x-x2sin2x)dx

A、AA: MOV DX,0FF1FH IN AL, DX MOV DX,0FF3FH OUT DX, AL JMP AA

B、AA: MOV DX,0FF1FH IN AL, DX MOV DX,0FF3FH NOT AL OUT DX, AL JMP AA

C、AA: MOV DX,0FF3FH IN AL, DX MOV DX,0FF1FH OUT DX, AL JMP AA

D、AA: MOV DX,0FF1FH IN AX, DX MOV DX,0FF3FH OUT DX, AX JMP AA

A.∫_a^bf(x)dx≥∫_a^bg(x)dx；

B.∫_a^bf(x)dx≤∫_a^bg(x)dx；

C.∫f(x)dx≥∫g(x)dx；

D.∫f(x)dx=∫_a^bg(x)dx

A.EX=6,DX=2.4

B.EX=2.4,DX=6

C.EX=0.6,DX=0.24

D.以上都不对

要输入端口 1234H 中的 8位数据,其指令应()

A MOV DX,1234H

B MOV DX,1234H OUT DX,AL IN AL,DX

C IN AX,1234H

D OUT DX,1234H

A、Ψ and dΨ /dx must be finite

B、Ψ and dΨ /dx must be single-valued

C、Ψ and dΨ /dx must be continuous

D、Ψ and dΨ /dx must be positive

要从端口1234H中读入8位数据,其指令应是()

AMOV DX,1234H OUT DX,AL

BIN AX,1234H

CMOV DX,1234H IN AL,DX

DOUT DX,1234H

A.DIV 2

B.DIV DX，2

C.SAR DX，1

D.SHL DX，1

求不定积分∫sin(ax)dx和∫cos(ax)dx。