函数f()、g()的定义如下图所示，调用函数f时传递给形参x的值为5，若采用传值(call by value)的方式调用g(a)，则函数f的返回值为(31)：若采用传引用(call by reference)的方式调用g(a)，则函数f的返回值为(32)。

Firewall is a(74) mechanism used by organizations to protect their LANs from the Internet.

In(75) programming, the user determines the sepuence of instions to be executed, not programmer.

C++ fully supports(73)programming.

(72) is the conscious effort to make all jobs similar, routine, and interchangeable.

(71 ) is the sending and receiving of the messages by computer. It is a fast, low-cost way of communicating worldwide.

In C language,(69) are used to create variables and are grouped at the top of a program block.

An(70) statement can perform. a calculation and store the result in a variable so that it can be used later.

(68) are those programs that help find the information you are trying to locate on the WWW．

(66) is a device that converts images to digital format．

In C language, a(67) is a series of characters enclosed in double quotes．