【判断题】【消耗次数：1】
关系模型的数据操作主要包括四种：查询、插入、删除和更改数据。
①
正确
②
错误
参考答案：
复制
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相关题目
【单选题】
数据库管理系统能实现对数据库中数据的查询．插入．修改和删除等操作，这种功能称为( )。
①
A．数据定义功能
②
B．数据管理功能
③
C．数据操纵功能
④
D．数据控制功能
【简答题】
传统的数据模型分类，数据库系统可以分为三种类型：[填空]、网状数据库模型和关系数据模型。
随机题目
【单选题】
15.It was on the day my first son was born _____ I put them in the soil.
①
when
②
who
③
that
④
where
【单选题】
19.Our school library is ________ closed for repairs.
①
shortly
②
quickly
③
temporarily
④
rapidly
【单选题】
24. They are teachers and dont realize ______ to start and run a company.
①
what it takes
②
what takes it
③
what they take
④
what takes them
【单选题】
21.If it ________ tomorrow, the match would be put off.
①
will rain
②
were to rain
③
was raining
④
had rained
【单选题】
4.The wedding ceremony is exactly ____ to coincide with his parents’ wedding anniversary.
①
timing
②
time
③
happening
④
timed
【单选题】
2. The notice can be written on any material as long as it’s _______.
①
clear
②
clean
③
legible
④
illegible
【单选题】
7.He saw the police cars ______ around the corner.
①
scream
②
jolt
③
screech
④
cling
【单选题】
4.Many people have accused the superpower of ____ bombing of the “innocent country”.
①
powerful
②
violent
③
indiscriminate
④
big
【单选题】
15.I feel terrible. I think I _____be sick.
①
will
②
am going to
③
should
④
ought to
【单选题】
11.The children were ______their father.
①
part from
②
parted with
③
parted in
④
parted from