● Data items are added or deleted from the list only at the top of the （72） .

（72）

● The （74）  scheme in a database system is responsible for the detection of failures and for the restoration of the database to a state that existed before the occurrence of the failure.

（74）

● Software （75）  focuses on three attributes of the program: software architecture, data structure, and procedural detail.

（75）

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

（73）

● （71） means that a program written for one computer system can be compiled and run on another system with little or no modification.

（71）

● Data items are added or deleted from the list only at the top of the （72） .

（72）

● 在http://www.test.com/main/index.htm中，index.htm是 （69） 。

（69）

 ● POP3服务默认的TCP 端口号是 （70） 。

（70）

● HTML语言中，可使用 （67） 标签将脚本插入HTML 文档。

（67）