用人单位不得安排未成年人和孕期、哺乳期女职工从事使用（）物品作业。A.检测  B.有

如果一个正数的平方根分别为3a-5和2a-10，则a=______．

需行镇痛对症治疗的是（）

A.单纯性肋骨骨折

B.多发性肋骨骨折

C.开放性肋骨骨折

D.多发性肋骨骨折伴有昏迷

E.多发性肋骨骨折伴有血气胸

商品经济的基本特征( )。

A．是开放型的经济

B．本质上是交换经济

C．以生产资料和产品属于不同的所有者为基础

D．是以社会分工和生产专业化为基础的经济

阅读理解。

     A story from the Bible (圣经) tells of old Babylon, where the men decided to build a tower that would

touch the sky. But God was unhappy, and he made them speak different languages. They couldn't understand

each other, so their dream never came true.

     Yet the dream remains alive: if all men speak the same language, they can do anything. L. L. Zamenhof

from Poland was among the men who pursue this dream. He developed Esperanto (世界语) between 1877

and 1885.

     As the most successful man-made world language, it is spoken by over two million people around the

world.

     Last month, the World Esperanto Congress (大会), dealing with language rights, ended in Sweden.

     Most Esperanto speakers are in Central and Eastern Europe and in East Asia, particularly Chinese mainland. 

     Esperanto has two advantages (优点). First, it's easy. Each letter has exactly one sound and there are just

16 basic grammar rules. The second advantage is that it belongs to no one country.

     But Esperanto has only reached a small number of people compared with natural languages widely used

around the world-such as English or Chinese. While these languages are deeply connected with their nations

and cultures, Esperanto doesn't have this background.

     Will Esperanto really become a global language? It remains a question.

1. The writer tells us a story at the beginning to ____.

A. explain why men have been making the effort to create a language shared by all

B. explain why men now speak different languages

C. show the relationship between man and God

D. prove language is very important

2. What does the underlined word "pursue" in the second paragraph mean?

A. Realize.

B. Work for.

C. Be against.

D. Follow. 

3. What is the basic difference between Esperanto and English?

A. More people speak English than Esperanto.

B. Esperanto words are easier to spell.

C. Esperanto has fewer grammar rules.

D. Esperanto is not supported by any country or culture.

4. What does the story mainly talk about?

A. Advantages and disadvantages of Esperanto.

B. Men's dream of sharing the same language.

C. Comparison of Esperanto and other languages like English and Chinese.

D. The most successful planned language-Esperanto.

接触网按其（）可分为软索式悬挂和刚性接触悬挂。

A．结构

B．供电方式

C．供电分区

D．都不是