编写汇编语言程序时,下列寄存器中程序员可访问的是()。
A.程序计数器(PC)
B.指令寄存器(IR)
C.存储器数据寄存器(MDR)
D.存储器地址寄存器(MAR)
参考答案:A
骨质疏松患者发生骨折的最常见部位是().
A.椎体
B.肱骨
C.股骨
D.髋骨
E.前臂
The main advantage of a Chinese stopper over the one line stopper is that it().
A.will not jam on the mooring line
B.is per
C.is easier to use when under heavy tension
D.is safer to use when under heavy tension