问题 单项选择题

一家公司最近安装了一个新的应付账款系统,这个系统是运行在个人电脑上的。6台电脑联网,能够访问主机上的应付账款系统。登录系统以后,一部分数据可以下载到网络用户处。数据录入和编辑程序常驻在网络上并且能够下载到个人电脑上执行。下面()控制可以用来确保应付账款信息不会不经过授权就从系统中移走。

A.登录系统时进行密码验证 

B.在个人电脑层面上使用数据加密 

C.在网络和主机上都安装数据文件访问控制软件 

D.在个人电脑上使用USBkey锁定

答案

参考答案:C

解析:

 网络和主机上的数据访问控制软件会将数据访问权限仅限制在经过授权的用户中。选项(a)不正确,尽管系统登录验证能够限制访问,但是不能防止数据不经过允许就被移走。选项(b)不正确,数据可以从网络文件服务器或主机上以电子化的形式获得。选项(d)不正确,尽管键盘锁定可以通过限制访问PC限制访问数据,但是它不能防止数据不经过允许就被移走。

阅读理解

More parents are looking to cellphones to help keep their children safe.  But mom and dad should be careful: Kids who talk on a cellphone may be more likely to step into traffic. Children should learn to end phone conversations before they prepare to step into traffic.

While research shows that older kids and more experienced users also don’t navigate(穿行于) streets as well while on a cellphone, younger children tends to find the small tools more distracting(令人分心的).

“Kids of this age are just learning to cross the street on their own, ”says David-Schwebel, a co-author of the study. “They’re beginners. ”

Kids don’t need to be stopped from chatting on the phone when outside,

however. Instead, parents simply should instruct them to finish their conversations before crossing the street.        

“I don’t think this means parents should take phones away from their kids, ”says Schwebel. “I encourage families to get cellphones for their children.  They’re more helpful than harmful,  if they’re used in a safe way. ”

Other distractions, such as conversations with friends, listening to music,  and text messaging, may also cause problems for children in this age group.  The researchers expect to study the effect of those types of distractions in the future.

Experts in child safety approved the cellphone study. “If you’re talking on a cellphone,  you’re not paying much attention to the environment around you, ” says Susan Baker, a professor.

Brooke Carlson, a 44-year-old mom, has noticed how riveted her 9-year-old son is when he’s talking on the cellphone. Although she’d never thought of the dangers of crossing traffic while on the phone, Carlson says, “Now that I know about it, it makes total sense. ”She plans to have a chat with her child about cellphones and street safety.

For younger kids, parents might consider purchasing a phone with a plan that only allows the child to call up his or her parents. That way the cellphone can be used for emergencies, but not for chatting with friends for hours.

小题1:In Schwebel’s opinion, _____ .

A.kids are still too young to walk on the street alone

B.kids don’t know how to use cellphones appropriately

C.kids have little experience in crossing the street alone

D.kids are not experienced cellphone users小题2: Which of the following is Schwebel in favor of?

A.Children shouldn’t be allowed to have a cellphone.

B.Children should be forbidden to chat on the phone when outside.

C.Cellphones do more harm to children than other distractions.

D.Parents should teach kids about cellphones and street safety.小题3: The underlined word “riveted” may mean“_____”.

A.confused

B.absorbed

C.dangerous

D.excited小题4: According to the passage, what does Mrs Carlson know?

A.There are dangers of crossing streets while on the phone.

B.Her 9-year-old son is not interested in talking on the phone.

C.Cellphones are more helpful than harmful to children.

D.Kids don’t pay attention to the environment when talking on the phone.小题5: The purpose of writing this passage is to _____.

A.advise parents not to buy cellphones for children

B.introduce a phone that only allows kids to call up parents

C.expect kids not to talk on cellphones while on the street

D.expect people to use cellphones less in daily life

多项选择题