在下列有关查询基础知识的说法中不正确的是( )。A.操作查询可以执行一个操作,如删

题型:单项选择题

问题:

在下列有关查询基础知识的说法中不正确的是( )。

A.操作查询可以执行一个操作,如删除记录或是修改数据

B.选择查询可以用来查看数据

C.操作查询的主要用途是对少量的数据进行更新

D.Access提供了4种类型的操作查询:删除查询、更改查询、追加查询和生成表查询

考点:计算机等级考试ACCESS二级ACCESS笔试375
题型:单项选择题

Leonardo da Vinci began painting the Mona Lisa in 1503. He was working on an important painting for a church at the time, but the church painting was not going well. An Italian businessman asked da Vinci to paint a picture of the businessman’s second wife. This is the woman who can be seen in the Mona Lisa.

All in all, the Mona Lisa is a very good example of da Vinci’s work. Da Vinci uses darkness and light in a clever way in the painting.

Da Vinci loved science and math. Right away a person can see that there is a lot of geometry (几何) in the Mona Lisa. The face of Mona Lisa is made of many circles and round shapes like balls. Even her smile can be seen as a small part of a large circle.

The woman in the painting is sitting on a balcony, and mountains can be seen behind her. Da Vinci loved to study rocks and mountains, so these can be seen over and over again in his other paintings.

The woman is sitting with her knees to the side. Her head is turned to look out of the painting. Her hands are held together in front of her. This way of sitting is now used by many artists when they are painting a picture of a man or woman today.

小题1:Who painted the Mona Lisa?

A.A businessman.

B.The second wife.

C.A man in the church.

D.Da Vinci.小题2:The woman in the painting is           .

A.standing in a garden

B.sitting on a balcony

C.standing in front of her house

D.at the foot of a mountain小题3:Da Vinci loved to study all of the following things except            .

A.the way people sit

B.science and math

C.mountains

D.rocks

题型:单项选择题

路由协议的作用是()

A.建立路由表

B.维护路由表

C.测量距离向量

D.测试链路状态

题型:单项选择题

某公司考虑下 * * 个可行而相互排斥的投资方案,三个方案的寿命期均为5年,基准贴现率为7%。
                                         某投资方案初始投资和年收益表

方案A1A2A3
初始投资/万元
年收益/万元
5000
1219
7000
1942
8500
2300
【问题】
用所列方法选择最优方案:(1)差额投资内部收益率;(2)差额投资净现值。

题型:单项选择题

信噪比和载噪比的关系?

题型:单项选择题

信息系统规划在企业战略规划的指引下,产生出三个互相联系的战略规划,它()的规划、()的规划和()的规划。

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