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问题 单项选择题

要写出高质量的SQL语句，提高系统的可用性，需要对查询进行优化，下面哪一项不是优化查询的常用方法______。

A．事务处理
B．使用游标
C．合理使用索引
D．不使用左(右)连接

答案

参考答案：A

阅读理解

This is a song millions of Americans will hear this New Year’s Eve. It is called Auld Lang Syne (《友谊地久天长》)。 It is the traditional music played during the New Year’s celebration. Auld Lang Syne is an old Scottish poem. It tells about the need to remember old friends.

The words “Auld Lang Syne” mean “old long since”. No one knows who wrote the poem first. However, a version (版本) by Scottish poet Robert Burns was published（出版）in 1796. The words and the music we know today first appeared in a songbook three years later.

The song is played in the United States mainly on New Year’s Eve. The version you are hearing today is by the Washington Saxophone Quartet. As we end our program with Auld Lang Syne, I would like to wish all our radio friends a very Happy New Year! This is Buddy Thomas.

小题1:This passage is from ___________.

A．a newspaper

B．a magazine

C．a TV program

D．a radio program小题2:Who is introducing Auld Lang Syne to us ?

A．Robert Burns

B．the Washington Saxophone Quartet

C．Buddy Thomas

D．The passage doesn’t tell us.小题3:The words and the music of Auld Lang Syne we know today first appeared _________.

A．in 1790

B．in 1793

C．in 1796

D．in 1799
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单项选择题

根据水利工程概算编制有关规定，施工企业利润应按直接工程费和间接费之和的（）计算。

A.0%

B.7%

C.9%

D.15%
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