控制系统的各子系统中，( )具有制定标准、评价效绩、纠正偏差的基本功能。
A．控制子系统
B．被控子系统
C．存储子系统
D．信息反馈子系统
参考答案：A
从静态的观点看，操作系统中的进程是由______、数据和进程控制块组成的。
Mary invested $8,400 for 6 months in a certificate of deposit paying percent simple annual interest. How much more interest would Mary have received if the interest rate on this certificate had been 9 percent simple annual interest ？（）
percent simple annual interest. How much more interest would Mary have received if the interest rate on this certificate had been 9 
percent simple annual interest ？（）