随着数据处理量急剧增长,人们对数据共享到要求越来越迫切,为了解决多用户、多应用共享数

题型:多项选择题

问题:

随着数据处理量急剧增长,人们对数据共享到要求越来越迫切,为了解决多用户、多应用共享数据到需求,使数据为尽可能多到应用程序服务,出现了数据库系统。请问数据库系统的特点有()

A.不同应用程序的数据之间不能共享

B.数据冗余度小,易于扩充

C.数据与程序独立

D.统一的数据控制功能

E.面向全组织到复杂数据结构

考点:信息管理学信息资源管理信息资源管理题库
题型:多项选择题
已知O是△ABC的外心,AB=2,AC=3,x+2y=1,若
AO
=x•
AB
+y•
AC
,(xy≠0),则cos∠BAC=______.
题型:多项选择题

Have you ever        _ your best friend?       [ ]

A. quarrelled with      

B. agreed with          

C. helped with

题型:多项选择题

以下关于项目干系人管理的叙述中,(55)的表述是不正确的。

A.对项目干系人的管理,由项目团队每个成员分别负责

B.项目干系人管理提高了干系人的满意度

C.项目干系人管理帮助解决与干系人相关的事宜

D.项目干系人管理加强了人员的协调行动能力

题型:多项选择题

阅读理解

     More than 10 years ago ,it was difficult to buy a tasty pineapple (菠萝). The fruits that made it to the

UK were green on the outside and , more often than not,hard with an unpleasant taste within. Then in

1996 , the Del Monte Gold pineapple produced in  Hawaii first hit our shelves.    

     The new type of pineapple looked more yellowy-gold than green. It was slightly softer on the outside

and had a lot of juice inside. But the most important thing about this new type of pineapple was that it was

twice as sweet as the hit-and-miss pineapples we had known. In no time, the Del Monte Gold took the

market by storm, rapidly becoming the world's best-selling pineapple variety, and delivering natural levels

of sweetness in the mouth, up until then only found in tinned pineapple.    

     In nutrition it was all good news too.This nice-tasting pineapple contained four times more vitamin C

than the old green variety. Nutritionists said that it was  not only full of vitamins , but also good against

some diseases. People were understandably eager to be able to buy this  wonderful  fruit. The new type

of pineapple was selling fast , and the Del Monte Gold pineapple rapidly became a fixture in the shopping

basket of the healthy eater.    

     Seeing the growing market for its winning pineapple,  Del  Monte tried to keep the market to itself.

But other fruit companies developed similar pineapples. Del Monte turned to law for help, but failed.

Those companies argued successfully that Del Monte's attempts to keep the golden pineapple for itself

were just a way to knock them out of the market.

1. We learn from the text that the new type of pineapple is_________.   

A. green outside and sweet inside    

B.good-looking outside and soft inside    

C. yellowy-gold outside and hard inside    

D.a little soft outside and sweet inside.

2. Why was the new type of pineapple selling well?   

 A. It was rich in nutrition and tasted nice.

B. It was less sweet and good for health.

C. It was developed by Del Monte.

D. It was used as medicine

3. The  underlined  word " fixture" in Paragraph 3 probably refers to something__________.

A. that people enjoy eating    

B. that is always present

C. that is difricult to get        

D. that people use as a gift

4. We learn from the last paragraph that Del Monte __________.

A. allowed other companies to develop pineapples

B. succeeded in keeping the pineapple for itself

C. tried hard to control the pineapple market

D. planned to help the other companies

题型:多项选择题

工程施工组织设计中,计算主要施工机械的需要量的依据是( )。

A.工程建筑安装造价

B.扩大定额

C.建筑面积

D.施工方案、进度计划和工程量

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