检索在1988年以前出版的书名。

假定分别在“职工”关系中的“年龄”和“月工资”字段上创建了索引，如下的 Select查询语句可能不会促使查询优化器使用索引，从而降低了查询效率，请写出既可以完成相同功能又可以提高查询效率的SQL语句。

SELECT 姓名，年龄，月工资 FROM职工

WHERE 年龄＞45 OR月工资＜1000;

在计算机执行的各种指令中，有些指令的操作数部分是地址。若想变址的话，则在指令执行前，应先将操作数部分的地址与指定的(19)中的地址值相加，从而求出有效地址。

A．基寄存器

B．变址寄存器

C．存储寄存器

D．指令地址寄存器

is a collection of web pages connected together with(67). Each document or page has a unique address that allows you to find it among the millions of other documents on the Web. The address is called a(68)(URL)or sometimes a Uniform. Resource Indicator(URL). When you chose a new link by clicking on it or by typing it into the address field your(69)sends a request for that document and displays it on the screen. That link can be to a different section of the current document, another document on the same website as the original or on another website anywhere in the world. Web pages are designed using(70)or HTML.

A．World Wild Web

B．World Wide Web

C．Web Wild World

D．Word Wide Web