控制器是由多个部件组成， (62) 不是构成控制器的部件。状态条件寄存器属于 CPU的 (63) 部件。
(18) 属于不对称加密法。DES加密算法的密钥长度是 (19) 。
Applications put computers to practical business (67) , but below the (68) it's the heart of an operating system-the kernel-that provides the technical wizardry to juggle multiple program, connect to networks and store (69) . A traditional kernel provides all the functions for applications. The kernel (70) memory, I/0 devices and parcels out processor time. The kernel also supports security and fault (71) , which is the ability to recover automatically when parts of the system fail.
若一个问题的求解既可以用递归算法，也可以用递推算法，则往往用 (26) 算法，因为 (27) 。
关系R和S见表1和表2，关系代数表达式Ⅱ1.5的结果为(56)，与该表达式等价的SQL语句为(57)。