●某计算机字长为8位，它用补码、原码或反码来表示带符号的二进制整数(最高一位为符号位)，则机器代码11111111所表示的十进制真值分别为 (6) 、 (7) 或 (8) 。

 (6)

●In recent ye

●C++is used with proper (75) design techniques.

(75)

●Note：M

●During the l

●Network (71)  h

●Melissa and Love Letter made use of the trust that exists between friends or colleagues.Imagine receiving an  (66)  from a friend who asks you to open it.This is what happens with Melissa and several other similar email  (67) .Upon running, such worms usually proceed to send themselves out to email addresses from the victim's address book,previous emails, web pages  (68) .

●防火墙技术可以分为 (65) 等3大类型。

(65)

●网络常见的故障不含 (64) 。

(64)

●网络性能管理是指 (63) 。

(63)

●下列各项不属于代理服务器功能的有 (62) 。

(62)