董仲舒政治思想的保守性主要体现在（） A．“大一统”思想 B．“省徭役，宽民力”

最常见的能够引起上呼吸道感染的病原体是（）

A.白念珠菌

B.链球菌

C.支原体

D.病毒

E.金黄色葡萄球菌

默写古诗《乡村四月》，并完成后面练习题。

                                           ，                                            。

                                          ，                                             。

1．补充诗句。

2．这首诗是____朝诗人______所作。本诗描绘出                时节的景象。前两句着重写                     ，后两句着重写                          。   

3．这首诗不仅表现了诗人对                             的热爱与欣赏，也表现出对                             的赞美。

利用两步滴定法测定阿司匹林肠溶片的含量时，先用氢氧化钠中和，水解，再用硫酸滴定液反滴定，由此能推算氢氧化钠与阿司匹林的摩比是

A．1：1

B．1：2

C．2：1

D．3：2

E．2：3

阅读理解。

     Some people are pessimistic(悲观的)when they think about the future. They say that, a hundred

years from now, we will have used up most of the earths resources. We will have made our seas so

dirty that we will not be able to eat fish from them. There will be so many people in the world that we

will have to use all the countryside for housing; there will be no farmland left.

     Other people have a different idea about the future. In their view, the city of the future will be a

huge pyramid-shaped(金字塔形的) building, which will be floating on the surface of the sea. About

5,000 families will live there, and there will also be schools, shops in it.

In a hundred years'time, people will not need to use oil. They will heat their homes with power from

the sun.

     Think of space. Perhaps a station will be set up on the moon; people will be able to visit the moon

as to urists. They may even spend their holidays in space, travelling from planet to planet.

     What an interesting picture!

     Many people don't think about the future. "I don't care. I'll be dead. "they say. But it is our duty

to care because the world of a hundred years'time will be the world of our children's and their children

after them.

1. How many viewpoints are discussed here about the future?

A. Two      

B. Three      

C. Four        

D. Five

2. In the pessimistic view, people will        in a hundred years 'time.

A. have to use power from the sea  

B. have to live on the moon    

C .be able to grow food on the sea  

D. find it difficult to live on the earth

3. Where will people live in the future in the optimistic view?

A. On the moon  

B. On the sea      

C. In pyramids    

D. On other planets

4. The writer of the article seems to agree        .  

A. with those who look at the bright side of the future

B. with those who take a pessimistic view about the future

C. with those who won't trouble their heads about the future  

D. to none of these viewpoints

高压氨水应在煤车（）后打开。