问题 填空题

你是否看到过:一只蚂蚁找到自己搬运不动的食物时,就在食物附近左摇右摆地转圈跑,然后左拐右拐地走回蚁巢,而它的同伴很容易地找到食物。试分析回答下列问题。  

(1)蚂蚁在食物附近左摇右摆和左拐右拐地走回巢,这种活动是蚂蚁的一种__                _。

(2)蚂蚁的这种活动,其作用是__                           __。  

(3)蚂蚁的同伴来时怎样找到要搬的食物?

(4)蚂蚁的这种活动有什么意义?

答案

(1)“舞蹈语言”;

(2)把自己身上的气味洒在食物周围和回巢的路上,也给自己留下定向标记,为同伴指明准确地点;

(3)它们用触角嗅留在地面上的属于本巢蚂蚁特有的气味而找到食物的;

(4)有利于维护个体和种族的生存

阅读理解

阅读理解。

     The leaders (领导人) of 13 countries had a big meeting in St Petersburg, Russia from November 21

to 24, 2010. The  meeting was  about  tigers. They  talked about the ways to protect the animals in their

countries. They agreed to spend more money protecting tigers and they wanted to double the number of

tigers in the world before 2022.

     Tiger is one of the world's most endangered animals. The  World  Wildlife Fund (WWF) says, there

are only about 100,000 wild tigers now. And  the  number  is  becoming  smaller and smaller. 'If nothing

happens, tigers will face disasters,' said WWF spokeswoman Marie von Zeipel.

     Nine types of tigers lived 100 years ago, but now at least three of them have died out. 'If people leave

tigers alone and don't kill them, then the number of tigers will double in 10 years,' said Jean

ChristophVie, a French tiger expert (专家).

      China is one of the 13 countries where tigers live. There are about 50 wild tigers in China now. They

are  the  Bengal  tigers in Tibet,  Indochinese   tigers  in  China's  southwest,  and  Siberian  tigers  in  the

northeast. The  South  China  tigers  lived in southeast  China  many  years  ago but  disappeared  in  the

1970s. Many experts think they have already died out.

1. What's the meeting in St Petersburg mainly about?

A. How to help tigers find a better place to live.

B. How to protect tigers in their countries.

C. How to stop people from hunting the wild animals.

D. How to count the number of tigers in the world.

2. Which of the following is TRUE according to the WWF?

A. Many tigers have died only because people hunt them.

B. About 3,200 tigers have died in the past 100 years.

C. There are more and more tigers these years.

D. There are about 100,000 wild tigers in the world now.

3.In Jean-Christoph Vie's opinion, the best way to double the number of tigers in10 years is __________.

A. to do nothing                    

B. to keep all of them in the zoo

C. to stop people from killing them      

D. to build more nature reserves for tigers

4. How many types of tigers were there in China 50 years ago?

A. 3          

B. 4          

C. 13        

D. 50

5. The Chinese meaning of 'die out' in the 3rd paragraph is ___.

A. 死亡      

B. 灭绝       

C. 变弱     

D. 死于

选择题