Ethereal是免费的网络协议检测程序，支持Unix，Windows。有以下特征：

阅读理解。

      In 1620, about half the U. S. A.  was covered by forests.  Today the forests have almost gone.  A lot

  of good land has gone with them, leaving only sand.  China doesn't want to copy the U. S. A. 's example.

  We're planting more and more trees.  We've built the "Great Green Wall" of trees across northern part of

 our country.  The Great Green Wall is 7,000 kilometers long, and between 400 and 1,700 kilometers

  wide.  It will stop the wind from blowing the earth away.  It will stop the sand from moving towards the

  rich farmland in the south.  More "Great Green Walls" are needed.  Trees must be grown all over the

 world.  Great Green Walls will make the world better.

1. In 1620, about _____ the USA was covered by forests. 

    A. a third  

    B. half

    C. two thirds  

    D. a fourth

2. A lot of good land has gone with _____ .

    A. sand  

    B. water

    C. wind  

    D. forests

3. The Great Green Wall in China is _____ long.

    A. 7,000 kilometers        

    B. 1,700 kilometers

    C. 7,000 meters           

    D. 400 kilometers

4. Trees must be grown in _____ .

    A. China              

    B. the USA

    C. some countries      

    D. every part of the world

5. _____ will make the world better.

    A. The Great Wall          

    B. Tall buildings

    C. Great Green Walls        

    D. Flowers and grass

露天采场上、下台阶之间，可设带扶手的行人梯子、台阶（踏步）或路堑作人行通道。

对服用碳酸锂的患者进行血药浓度测定，最适合的分析方法是（）

A.荧光分光光度法

B.液相色谱-质谱联用法

C.紫外分光光度法

D.气相色谱法

E.原子吸收光谱法

对诊断肾阳虚证最有意义的是（）

A.腰酸耳鸣，夜尿频多

B.阳事不举，腰酸畏寒

C.梦遗早泄，烦热盗汗

D.形寒肢冷，舌淡脉弱

E.呼多吸少，动则气喘

二十八初孕妇，孕33周，自觉乏力、食欲差，伴恶心、呕吐2周，小便深黄色，皮肤瘙痒5日。查体：体温37.5℃，血压130/90mmHg，神志清，皮肤巩膜黄染，躯干及四肢皮肤可见散在出血点，肝肋下未触及，胎头入盆，胎心140次／分。

若ALT542U/L，总胆红素85.5μmol/L，结合胆红素46μmol/L，尿胆红素（+），HBsAg（+），本例最可能的诊断是（）

A.妊娠高血压疾病引起的肝损害

B.妊娠剧吐

C.妊娠急性脂肪肝

D.妊娠合并病毒性肝炎

E.妊娠肝内胆汁淤积症