为用户与数据库系统提供接口的语言是( )。A．高级语言 B．_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

为用户与数据库系统提供接口的语言是( )。

A．高级语言

B．数据描述语言(DDL)

C．数据操纵语言(DML)

D．汇编语言

答案

参考答案：C

解析：DBMS提供数据操纵语言(DML)实现对数据库中数据的操作，数据操纵语言(DML)是用户(包括应用程序)与数据库系统的接口。数据操纵语言通常包括检索和更新功能。

填空题

根据短文内容，在方框内选择合适的词并用其适当形式填入空格内，每词仅用一次，有三词多余。

have, see, go, come, visit, can, be, fly, give, take, like, buy

     Lynn and Paul are in Pairs this weekend. They __1__ from London and get to the airport at 10:00
am. on Saturday morning.
     They __2__ a taxi from the airport to their hotel in the center of Pairs. On Saturday afternoon, Lynn
__3__ to the bookstore and __4__a lot of comic books.
     In the evening, they __5__ dinner in a French restaurant. On Sunday they __6__ the Louvre
Museum where they __7__ the "Monalisa". They __8__ all the things in the museum and they __9__
very tired. They go home on Sunday evening.

填空题

决定化学反应速率的主要因素是，影响反应速率的外部条件有、、、等。