题目内容

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

A. LAN
B. Post office
C. E-Mail
D. Interface

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

A. executable
B. input
C. output
D. assignment

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

A. reliable
B. stable
C. peaceful
D. security

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

A. declarations
B. dimensions
C. comments
D. descriptions

宽松的货币政策是指货币的供应量小于货币的实际需求量。( )

A. 对
B. 错