生物进化的总趋势是（ ） A．由简单到复杂、由低等到高等、由陆生到水生 B．由简

根据短文内容和首字母提示完成单词，并将单词完整的写在后面的横线上。

     We live in the "(1)c             age". Just 41 years ago, computers couldn't do much. They were very big

and (2)e             . They used a lot of energy (能量). Only a few people were interested in them. Today

computers are smaller and (3)c            . They can do much difficult (4)w            .

     Computers become important for many reasons (原因). They work (5)f             than man and make

few mistakes. They can "remember" much information. A computer can do millions (百万) of problems in

a few seconds. A person might need years to work (6)o             so many problems.

     People now use computers in every (7)k              of work. Computers are very useful and the use of

computers is growing. More computers mean more jobs for people, because people need to run (操作)

and mend (修理) them. Would you like to learn (8)h             to run a computer?

环境卫生学主要研究（）

A.自然环境与人群健康的关系

B.生活环境与人群健康的关系

C.自然环境和生活环境与人群健康的关系

D.生活居住环境和自然环境与人群健康的关系

E.自然环境、生活居住环境、工作学习环境与人群健康的关系

化学迷路切断术是指（）

A.外耳重建

B.前突耳矫正

C.内耳破坏

D.镫骨撼动

E.鼓室注射

在旅游活动中，人们的不少决策是属于（）的

A、重大决策

B、规范性决策

C、瞬时决策

D、介于A和B之间

左心腔超声造影，用直径小于红细胞的造影剂，下述哪一项是错误的（）

A.造影剂从末梢静脉经腔静脉进入右心

B.造影剂进入右心后通过肺循环

C.造影剂通过肺循环经肺静脉进入左心腔

D.经外周动脉注入造影剂

E.经末梢静脉注入造影剂，通过肺毛细血管网从静脉回右心