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【单选题】
对于算术左移指令 SAL AL,1,若AL中的带符号数在指令执行后符号有变,可以通过( )来确认。
A.
OF=1
B.
OF=0
C.
CF=1
D.
CF=0
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】执行下列二进制算术加运算11001001+00100111,其运算结果是____。
A.
10100010
B.
00000001
C.
11110000
D.
11101111
【单选题】A. As is known, we set great store by the trade relationship with the third world countries.B. We’ve never had any difficulties with our Chinese partners, and we ’ d like to make as many new contacts ...
A.
By leaving out some necessary information.
B.
By providing more information than needed.
C.
By using their body language.
D.
By telling some unbelievable lies.
【单选题】下面关于FX2N系列PLC的步进指令编程的叙述中错误的是（ ）。
A.
在STL与RET指令之间不能使用MC、MCR指令
B.
STL指令后面只跟AND/ANI指令
C.
在不同的状态之间，可编写同样的输出继电器
D.
状态号不可重复使用