数据独立性是数据库技术的重要特点之一。所谓数据独立性是指( )。A.数据与程序独立

题型:单项选择题

问题:

数据独立性是数据库技术的重要特点之一。所谓数据独立性是指( )。

A.数据与程序独立存放

B.不同的数据被存放在不同的文件中

C.不同的数据只能被对应的应用程序所使用

D.以上三种说法都不对

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

Personal computers and the Internet give people new choices about how to spend their time.

Some may use this freedom to share less time with certain friends or family members, but new technology will also let them stay in closer touch with those they care most about. I know this from personal experience.

E-mail makes it easy to work at home, which is where I now spend most weekends and evenings. My working hours aren’t necessarily much shorter than they once were but I spend fewer of them at the office. This lets me share more time with my young daughter than I might have if she’d been born before electronic mail became such a practical tool.

The Internet also makes it easy to share thoughts with a group of friends. Say you do something fun -see a great movie perhaps-and there are four or five friends who might want to hear about it. If you call each one, you may tire of telling the story.

With E-mail, you just write one note about your experience, at your convenience, and address it to all the friends you think might be interested. They can read your message when they have time, and read only as much as they want to. They can reply at their convenience, and you can read what they have to say at your convenience.

E-mail is also an inexpensive way stay in close touch with people who live far away. More than a few parents use E-mail to keep in touch, even daily touch, with their children off at college.

We just have to keep in mind that computers and the Internet offer another way of staying in touch. They don’t take the place of any of the old ways.

64. The purpose of this passage is to ________.

A. explain how to use the Internet

B. describe the writer’s joy of keeping up with the latest technology

C. tell the merits(价值) and usefulness of the Internet

D. introduce the reader to basic knowledge about personal computers and the Internet

65. According to the writer, E-mail has an obvious advantage over the telephone because the former(前者) helps one _________.

A. reach a group of people at a time conveniently

B. keep one’s communication as personal as possible

C. pass on much more information than the later

D. get in touch with one’s friends faster than the later

66. The best title for this passage is ________.

A. Computer: New Technological Advances

B. Internet: New Tool to Maintain Good Friendship

C. Computers Have Made Life Easier

D. Internet: a Convenient Tool for Communication

题型:单项选择题

实验室中某些气体的制取、收集及尾气处理装置如图所示(省略了净化装置)。仅用此装置和表中提供的物质完成相关实验,最合理的选项是(  )

选项a中的物质b中的物质c中收集的气体d中的物质
A氯化铵NaOHNH3H2O
B浓硫酸Na2SO3SO2NaOH溶液
C稀硝酸CuNO2H2O
D浓盐酸MnO2Cl2NaOH溶液
 

题型:单项选择题

IEEE 802.11采用CSMA/CA协议,采用这个协议的原因是 ____________。

A.这个协议比CSMA/CD更安全

B.这种协议可以引进更多业务

C.这种协议可以解决隐蔽终端问题

D.这个协议比其他协议更有效率

题型:单项选择题

甲市公民赵某,将其户口从甲市迁出,想落在乙市。在乙市正式落户前,赵某前往苏州打工。赵某在苏州打工10个月,因出现事故受伤,被送往上海某医院治疗达1年零8个月。根据《民法通则》的规定,赵某住所地应为

A.甲市

B.乙市

C.苏州市

D.上海市

题型:单项选择题

若伸指肌腱在掌指关节近侧端断裂时,掌指关节不能伸直而指间关节因什么牵拉仍可伸直()。

A.中央囊

B.骨间肌

C.屈指伸肌腱

D.屈指浅肌腱

E.蚓状肌

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