指令寄存器的位数取决于( )。
A．存储器容量
B．机器字长
C．指令字长
D．指令字长和机器字长
参考答案：C
Hong Kong was so busy over the Spring Festival that all the hotel accommodation was full. She phoned several hotels but none of them had a _________ room.
A．cheap
B．nice
C．separate
D．vacant
下列那种药孕妇忌服
A．清咽丸
B．穿心莲片
C．金莲花片
D．金果含片
E．铁笛丸
