下列关于各种材料的说法正确的是（ ） A．铝、橡胶、塑料都是很好的绝缘材料 B．

女婴10天，主因纳差1天，发现皮肤黄染伴发热6小时入院。查体：脐轮红，有脓性分泌物，精神差，嗜睡，血WBC 44.7×10⁹/L，中性粒细胞65%，血Hb 132.98/L，血总胆红素443.94μmol/L (25.8mg/dl)，直接胆红素为30.9μmol/L (1.8mg/dl)。最可能的诊断是

A．新生儿窒息，脐炎，病理性黄疸
B．新生儿肝炎，脐炎，病理性黄疸
C．新生儿肺炎，溶血症，脐炎
D．新生儿颅内出血，败血症，脐炎
E．新生儿脐炎，败血症，高胆红素血症

某同学在家中尝试验证平行四边形定则，他找到三条相同的橡皮筋（遵循胡克定律）和若干小重物，以及刻度尺、三角板、铅笔、细绳、白纸、钉子，设计了如下实验：将两条橡皮筋的一端分别固定在墙上的两个钉子A、B上，另一端与第三条橡皮筋连接，结点为O，将第三条橡皮筋的另一端通过细绳挂一重物。

（1）为完成实验，下述操作中必需的是_______________。

a．测量细绳的长度

b．测量橡皮筋的原长

c．测量悬挂重物后像皮筋的长度

d．记录悬挂重物后结点O的位置

（2）钉子位置固定，欲利用现有器材，改变条件再次实验证，可采用的方法是_______________。

阅读理解。

     A new generation addiction is quickly spreading all over the world.Weboholism,a twentieth

century disease,affects people from different ages.They surf the net,use email and speak in chat

rooms.They spend many hours on the computer,and it becomes a compulsive habit.They cannot

stop,and it affects their lives.

     Ten years ago,no one thought that using computers could become compulsive behavior that

could affect the social and physical life of computer users.This obsessional behavior has

affected teenagers and college students.They are likely to log on computers and spend long

hours at different websites.

     They become hooked on computers and gradually their social and school life is affected

by this situation.They spend all free time surfing and don't concentrate on homework,so this

addiction influences their grades and success at school.Because they can find everything on

the websites,they hang out there.Moreover,this addiction to websites influences their social life.   

     They spend more time in front of computers than with their friends.The relation with their

friends changes.The virtual life becomes more important than their real life.They have a new

language that they speak in the chat rooms and it causes cultural changes in society.

     Because of the change in their behavior,they begin to isolate themselves from the society

and live with their virtual friends.They share their emotions and feelings with friends who they

have never met in their life.Although they feel confident on the computer,they are not confident

with real live friends they have known all their life.It is a problem for the future.This addictive

behavior is beginning to affect all the world.

1．The main idea of the passage is about________.

A．the cause of weboholism

B．the advantage of weboholism

C．the popularity of weboholism

D．the influence of weboholism

2．The underlined word“obsessional”in the second paragraph most probably means“________”．

A．attractive      

B．addictive

C．professional              

D．potential

3．We can infer from the passage that________.

A．weboholism has the greatest effect on teenagers

B．students can hardly balance real and virtual life

C．people are addicted to games on the Internet

D．virtual life is more vivid and attractive anyway

4．Which of the following is NOT true of weboholism?

A．It contributes to the development of the web.

B．The chat room language may change social culture.

C．The problem will be getting more and more serious later.

D．People addicted to the web often become inactive in real life.

5．The author's attitude towards weboholism is that of being________.

A．optimistic          

B．positive

C．oppositive          

D．acceptable

腰骶段损伤可引起（）

A．双上肢痉挛性瘫痪 

B．双下肢痉挛性瘫痪 

C．四肢痉挛性瘫痪 

D．四肢迟缓性瘫痪 

E．双下肢迟缓性瘫痪

( )决定了建设项目的价值工程活动具有高效性，节约的潜力大，开展价值工程活动的效益高。

A．建设生产的单件性特点

B．建设产品的多样性特点

C．建设产品的投资巨大、价值高昂的特点

D．建设产品具有的使用寿命长的特点