问题 单项选择题 共用题干题

男性,60岁。进行性加重的痴呆,手部震颤,肌阵挛和行走时共济失调半年。伴构音不清,语言缓慢。无神经系统遗传变性病家族史。脑MRI如图。脑电图示双侧脑部弥散的间隔0.5~2s的周期性棘—慢复合波。脑动脉血管造影无血管异常征象。

最可能的诊断为()

A.神经梅毒

B.血管性痴呆

C.Friedreich共济失调

D.Alzheimer病

E.皮质-纹状体-脊髓变性

答案

参考答案:E

阅读理解

阅读理解。

     Teens don't understand the big fuss (小题大做). As the first generation to grow up in a wired world, they

hardly know a time when computers weren't around, and they eagerly catch the chance to spend hours online,

chatting with friends, So what?

     But researchers nationwide are increasingly worried that teens are becoming isolated (孤寂), less skillful at

person-to-person relationships, and perhaps numb (麻木) to the cheatings that are so much a part of the e-mail

world. "And a teen's sense of self and values may be changed in a world where personal connections can be

limitless,"said Sherry Turkle.

     Another researcher, Robert Kraut, said he's worried about the "opportunity costs" (机会成本) of so much

online time for youths. He found that teens who used computers, even just a few hours a week, showed

increased signs of loneliness and social isolation. "Chatting online may be better than watching television, but

it's worse than hanging out (闲逛) with real friends," he said.

     Today's teens, however, don't see anything strange in the fact that the computer takes up a central place in

their social lives, "School is busy and full of pressure. There's almost no time to just hang out." said Parker Rice,

17. "Talking online is just catch-up time."

     Teens say they feel good about what they say online or taking the time to think about a reply. Some teens

admit that asking someone for a date, or breaking up, can be easier in message form, though they don't want

to do so. But they insist there's no harm.

1. The researchers argue that _____.

A. teens may develop a different sense of values

B. nothing is wrong with teens' chatting online

C. teens can manage their social connections

D. spending hours online does much good to teens

2. The text mainly deals with _____.

A. use computers properly

B. improve their school work

C. develop an interest in social skills

D. reduce their mental pressures

3. The text mainly deals with _____. 

A. teens' pleasant online experience

B. teens' computer skills and school work

C. the effects of the computer world on teens

D. different opinions on teens' chatting online

4. The purpose of the text is to _____.

A. describe computer research results

B. draw attention to teens' computer habits

C. suggest ways to deal with problem teens

D. discuss problems teens have at school

问答题